diff --git a/frontend/src/api/ai.ts b/frontend/src/api/ai.ts
index 726124c..3a43562 100644
--- a/frontend/src/api/ai.ts
+++ b/frontend/src/api/ai.ts
@@ -91,6 +91,21 @@ export function parseChannelByAi(text: string) {
   return request.post('/ai/channel', { text }, { timeout: 60000 })
 }
 
+/** AI 生成的账单关系名称与备注建议 */
+export interface AiRelationResult {
+  name: string
+  remark: string
+  reason: string
+}
+
+/** 根据关系类型与成员账单特征生成关系名称与备注（调用大模型，超时放宽） */
+export function parseRelationByAi(data: {
+  type: string
+  members: { type: string; channel?: string; categoryName?: string; remark?: string }[]
+}) {
+  return request.post('/ai/relation', data, { timeout: 60000 })
+}
+
 /** 根据表单当前内容生成单条分类与标签建议（调用大模型，超时放宽） */
 export function suggestOneByAi(data: { type: string; amount?: number | null; channel?: string; remark?: string }) {
   return request.post('/ai/suggest-one', data, { timeout: 60000 })
diff --git a/frontend/src/api/transactionGroup.ts b/frontend/src/api/transactionGroup.ts
new file mode 100644
index 0000000..786ccfe
--- /dev/null
+++ b/frontend/src/api/transactionGroup.ts
@@ -0,0 +1,86 @@
+// 账单关系相关 API 接口：账单之间父子/同级关系的查询与维护
+import request from './request'
+
+/** 关系组内角色：PARENT-父账单，CHILD-子账单，MEMBER-成员 */
+export type TransactionGroupRole = 'PARENT' | 'CHILD' | 'MEMBER'
+
+/** 关系类型：PARENT_CHILD-父子，SIBLING-同级 */
+export type TransactionRelationType = 'PARENT_CHILD' | 'SIBLING'
+
+/** 关系组成员（含关联账单的展示快照） */
+export interface TransactionGroupItem {
+  transactionId: number
+  role: TransactionGroupRole
+  sortOrder: number
+  type: string
+  amount: number
+  channel: string
+  remark: string
+  remarkHidden: boolean
+  transactionTime: string
+  categoryName: string
+  categoryIcon: string
+}
+
+/** 账单关系组 */
+export interface TransactionGroup {
+  id: number
+  type: TransactionRelationType
+  name: string
+  remark: string
+  createdAt: string
+  updatedAt: string
+  items: TransactionGroupItem[]
+}
+
+/** 关系组成员提交项 */
+export interface TransactionGroupItemPayload {
+  transactionId: number
+  role?: TransactionGroupRole
+  sortOrder?: number
+}
+
+/** 关系组成员草稿（前端编辑用，含账单展示快照） */
+export interface RelationMemberDraft {
+  transactionId: number
+  type: string
+  amount: number
+  channel: string
+  remark: string
+  transactionTime: string
+  categoryName: string
+  categoryIcon: string
+}
+
+/** 关系组提交数据 */
+export interface TransactionGroupPayload {
+  type: TransactionRelationType
+  name?: string
+  remark?: string
+  items: TransactionGroupItemPayload[]
+}
+
+/** 查询某笔账单所属的全部关系组 */
+export function getGroupsByTransaction(transactionId: number) {
+  return request.get(`/transaction/group/by-transaction/${transactionId}`)
+}
+
+/** 查询关系名称历史（可选按关系类型过滤），返回按最近使用排序的名称列表 */
+export function getGroupNames(type?: string) {
+  return request.get('/transaction/group/names', { params: type ? { type } : {} })
+}
+
+/** 创建账单关系组，返回新建关系组ID */
+export function createTransactionGroup(data: TransactionGroupPayload) {
+  return request.post('/transaction/group', data)
+}
+
+/** 更新账单关系组 */
+export function updateTransactionGroup(id: number, data: TransactionGroupPayload) {
+  return request.put(`/transaction/group/${id}`, data)
+}
+
+/** 删除账单关系组（仅解除关联，不删除账单） */
+export function deleteTransactionGroup(id: number) {
+  return request.delete(`/transaction/group/${id}`)
+}
diff --git a/frontend/src/components/TransactionDetailModal.vue b/frontend/src/components/TransactionDetailModal.vue
new file mode 100644
index 0000000..a9777e6
--- /dev/null
+++ b/frontend/src/components/TransactionDetailModal.vue
@@ -0,0 +1,260 @@
+<script setup lang="ts">
+// 账单详情弹窗组件：集中展示单条账单的基本信息、标签、账单关系、来源图片与原始数据
+import { ref, watch } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { useMessage, NModal, NSpace, NButton, NTag, NSpin, NDescriptions, NDescriptionsItem, NInput } from 'naive-ui'
+import { getAiImageBlob } from '../api/ai'
+import { getChannelLabel } from '../utils/channel'
+import TransactionRelationPanel from './TransactionRelationPanel.vue'
+
+/** 详情弹窗展示的账单信息（由交易列表传入） */
+interface DetailTransaction {
+  id: number
+  type: string
+  amount: number
+  channel: string
+  remark: string
+  remarkHidden: boolean
+  transactionTime: string
+  includeInStats: boolean
+  categoryName: string
+  categoryIcon: string
+  tags: { id: number; name: string; color: string }[]
+  imageIds: number[]
+  rawData: string | null
+  createdAt: string
+}
+
+/** 来源图片查看项：默认加载缩略图，可按需切换为原图 */
+interface ImageItem {
+  id: number
+  url: string
+  isOriginal: boolean
+  loading: boolean
+}
+
+const props = defineProps<{
+  show: boolean
+  transaction: DetailTransaction | null
+}>()
+
+const emit = defineEmits<{
+  (e: 'update:show', value: boolean): void
+  (e: 'changed'): void
+  (e: 'edit'): void
+}>()
+
+const { t } = useI18n()
+const message = useMessage()
+
+const imageItems = ref<ImageItem[]>([])
+const imageLoading = ref(false)
+
+watch(() => props.show, (value) => {
+  if (value) {
+    loadImages()
+  } else {
+    clearImages()
+  }
+})
+
+// 切换账单时若弹窗已打开则重新加载来源图片
+watch(() => props.transaction?.id, () => {
+  if (props.show) {
+    loadImages()
+  }
+})
+
+/** 关闭弹窗（同步 v-model） */
+function onShowChange(value: boolean) {
+  emit('update:show', value)
+}
+
+/** 金额展示 */
+function formatAmount(item: { type: string; amount: number }) {
+  return `${item.type === 'INCOME' ? '+' : '-'}${Number(item.amount ?? 0).toFixed(2)}`
+}
+
+/** 时间展示 */
+function formatTime(time: string) {
+  return time ? time.replace('T', ' ').substring(0, 16) : '-'
+}
+
+/** 格式化原始数据为缩进 JSON */
+function formatRaw(raw: string | null) {
+  if (!raw) return ''
+  try {
+    return JSON.stringify(JSON.parse(raw), null, 2)
+  } catch (e) {
+    return raw
+  }
+}
+
+/** 从接口响应中提取图片 Blob（blob 响应经拦截器后返回完整 axios response，需取其 data） */
+function extractBlob(res: any): Blob {
+  return res?.data instanceof Blob ? res.data : (res instanceof Blob ? res : new Blob([res]))
+}
+
+/** 加载来源图片缩略图（避免大图拖慢打开速度） */
+async function loadImages() {
+  clearImages()
+  const imageIds = props.transaction?.imageIds || []
+  if (imageIds.length === 0) return
+  imageLoading.value = true
+  try {
+    const items: ImageItem[] = []
+    for (const id of imageIds) {
+      const res: any = await getAiImageBlob(id, true)
+      items.push({ id, url: URL.createObjectURL(extractBlob(res)), isOriginal: false, loading: false })
+    }
+    imageItems.value = items
+  } catch (e: any) {
+    message.error(e.message || t('common.loadFailed'))
+  } finally {
+    imageLoading.value = false
+  }
+}
+
+/** 将指定来源图片切换为原图（替换并释放旧缩略图 objectURL） */
+async function loadOriginalImage(item: ImageItem) {
+  if (item.isOriginal || item.loading) return
+  item.loading = true
+  try {
+    const res: any = await getAiImageBlob(item.id)
+    const url = URL.createObjectURL(extractBlob(res))
+    URL.revokeObjectURL(item.url)
+    item.url = url
+    item.isOriginal = true
+  } catch (e: any) {
+    message.error(e.message || t('common.loadFailed'))
+  } finally {
+    item.loading = false
+  }
+}
+
+/** 释放来源图片 objectURL */
+function clearImages() {
+  for (const item of imageItems.value) {
+    URL.revokeObjectURL(item.url)
+  }
+  imageItems.value = []
+}
+</script>
+
+<template>
+  <NModal
+    :show="show"
+    preset="card"
+    :title="t('transaction.detail.title')"
+    style="width: 860px; max-width: 94vw;"
+    @update:show="onShowChange"
+  >
+    <div v-if="transaction" style="max-height: 72vh; overflow-y: auto; padding-right: 4px;">
+      <!-- 基本信息 -->
+      <NDescriptions :column="2" bordered size="small" label-placement="left" style="margin-bottom: 16px;">
+        <NDescriptionsItem :label="t('transaction.column.type')">
+          <NTag :type="transaction.type === 'INCOME' ? 'success' : 'error'" size="small">
+            {{ transaction.type === 'INCOME' ? t('common.types.income') : t('common.types.expense') }}
+          </NTag>
+        </NDescriptionsItem>
+        <NDescriptionsItem :label="t('transaction.column.amount')">
+          <span :style="{ fontWeight: 600, color: transaction.type === 'INCOME' ? '#18a058' : '#d03050' }">
+            {{ formatAmount(transaction) }}
+          </span>
+        </NDescriptionsItem>
+        <NDescriptionsItem :label="t('transaction.column.category')">
+          {{ transaction.categoryIcon ? transaction.categoryIcon + ' ' : '' }}{{ transaction.categoryName || t('transaction.uncategorized') }}
+        </NDescriptionsItem>
+        <NDescriptionsItem :label="t('transaction.column.channel')">
+          {{ getChannelLabel(transaction.channel) }}
+        </NDescriptionsItem>
+        <NDescriptionsItem :label="t('transaction.column.transactionTime')">
+          {{ formatTime(transaction.transactionTime) }}
+        </NDescriptionsItem>
+        <NDescriptionsItem :label="t('transaction.includeInStats')">
+          {{ transaction.includeInStats ? t('transaction.includeFilter.yes') : t('transaction.includeFilter.no') }}
+        </NDescriptionsItem>
+        <NDescriptionsItem :label="t('transaction.column.remark')" :span="2">
+          {{ transaction.remark || '-' }}
+        </NDescriptionsItem>
+        <NDescriptionsItem :label="t('transaction.detail.createdAt')" :span="2">
+          {{ formatTime(transaction.createdAt) }}
+        </NDescriptionsItem>
+      </NDescriptions>
+
+      <!-- 标签 -->
+      <div class="detail-section">
+        <div class="detail-section-title">{{ t('transaction.column.tags') }}</div>
+        <NSpace :size="4">
+          <NTag
+            v-for="tag in transaction.tags || []"
+            :key="tag.id"
+            size="small"
+            :color="{ color: tag.color || '#2080f0', textColor: '#fff' }"
+          >
+            {{ tag.name }}
+          </NTag>
+          <span v-if="!transaction.tags || transaction.tags.length === 0" style="color: #999;">{{ t('transaction.detail.noTags') }}</span>
+        </NSpace>
+      </div>
+
+      <!-- 账单关系 -->
+      <div class="detail-section">
+        <div class="detail-section-title">{{ t('transaction.detail.relations') }}</div>
+        <TransactionRelationPanel :transaction="transaction" @changed="emit('changed')" />
+      </div>
+
+      <!-- 来源图片 -->
+      <div class="detail-section">
+        <div class="detail-section-title">{{ t('transaction.detail.images') }}</div>
+        <NSpin :show="imageLoading">
+          <NSpace v-if="imageItems.length > 0" vertical :size="12">
+            <div v-for="item in imageItems" :key="item.id">
+              <img :src="item.url" alt="source image" style="width: 100%; max-height: 60vh; object-fit: contain; border-radius: 6px;" />
+              <div style="margin-top: 6px; text-align: right;">
+                <NTag v-if="item.isOriginal" size="small" type="success">{{ t('transaction.originalImage') }}</NTag>
+                <NButton v-else size="small" :loading="item.loading" @click="loadOriginalImage(item)">
+                  {{ t('transaction.loadOriginal') }}
+                </NButton>
+              </div>
+            </div>
+          </NSpace>
+          <span v-else-if="!imageLoading" style="color: #999;">{{ t('transaction.detail.noImages') }}</span>
+        </NSpin>
+      </div>
+
+      <!-- 原始数据 -->
+      <div class="detail-section">
+        <div class="detail-section-title">{{ t('transaction.detail.rawData') }}</div>
+        <NInput
+          v-if="transaction.rawData"
+          :value="formatRaw(transaction.rawData)"
+          type="textarea"
+          readonly
+          :autosize="{ minRows: 6, maxRows: 18 }"
+        />
+        <span v-else style="color: #999;">{{ t('transaction.detail.noRawData') }}</span>
+      </div>
+    </div>
+
+    <template #footer>
+      <NSpace justify="end">
+        <NButton @click="emit('edit')">{{ t('common.edit') }}</NButton>
+        <NButton @click="onShowChange(false)">{{ t('common.cancel') }}</NButton>
+      </NSpace>
+    </template>
+  </NModal>
+</template>
+
+<style scoped>
+.detail-section {
+  margin-bottom: 18px;
+}
+
+.detail-section-title {
+  font-size: 14px;
+  font-weight: 600;
+  margin-bottom: 8px;
+  color: #333;
+}
+</style>
diff --git a/frontend/src/components/TransactionRelationEditorModal.vue b/frontend/src/components/TransactionRelationEditorModal.vue
new file mode 100644
index 0000000..fc45049
--- /dev/null
+++ b/frontend/src/components/TransactionRelationEditorModal.vue
@@ -0,0 +1,443 @@
+<script setup lang="ts">
+// 账单关系编辑弹窗组件：新建或编辑关系组（类型、名称、备注、成员与角色），供详情面板与列表勾选创建复用
+import { ref, computed, watch, onMounted } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { useMessage, NModal, NSpace, NButton, NForm, NFormItem, NInput, NAutoComplete, NRadioGroup, NRadio, NDataTable, NPagination } from 'naive-ui'
+import type { DataTableColumns } from 'naive-ui'
+import { createTransactionGroup, updateTransactionGroup, getGroupNames } from '../api/transactionGroup'
+import type { TransactionGroup, TransactionRelationType, TransactionGroupPayload, RelationMemberDraft } from '../api/transactionGroup'
+import { getTransactionPage } from '../api/transaction'
+import { getAiConfig, parseRelationByAi } from '../api/ai'
+import { getChannelLabel } from '../utils/channel'
+
+/** 关系类型偏好存储键（界面偏好统一以 finance. 前缀命名） */
+const RELATION_TYPE_KEY = 'finance.transaction.relationType'
+
+const props = defineProps<{
+  /** 弹窗显示状态 */
+  show: boolean
+  /** 编辑已有关系组时传入，创建时为 null */
+  editingGroup: TransactionGroup | null
+  /** 创建时的初始成员（预填） */
+  initialMembers: RelationMemberDraft[]
+  /** 不可移除的锚点账单ID（详情内新建时为当前账单），可为 null */
+  anchorTransactionId: number | null
+}>()
+
+const emit = defineEmits<{
+  (e: 'update:show', value: boolean): void
+  (e: 'saved'): void
+}>()
+
+const { t } = useI18n()
+const message = useMessage()
+
+// 编辑状态
+const editingGroupId = ref<number | null>(null)
+const editorType = ref<TransactionRelationType>('PARENT_CHILD')
+const editorName = ref('')
+const editorRemark = ref('')
+const editorMembers = ref<RelationMemberDraft[]>([])
+const parentId = ref<number | null>(null)
+const saving = ref(false)
+const aiEnabled = ref(false) // AI 是否启用，用于控制生成入口显示
+const aiRelationLoading = ref(false) // AI 生成关系名称/备注请求状态
+const nameOptions = ref<{ label: string; value: string }[]>([]) // 关系名称历史下拉选项
+const nameMenuShow = ref(false) // 关系名称下拉显示状态（聚焦即显示）
+
+// 关联账单选择弹窗状态
+const showPicker = ref(false)
+const pickerRows = ref<RelationMemberDraft[]>([])
+const pickerChecked = ref<number[]>([])
+const pickerPage = ref(1)
+const pickerSize = ref(10)
+const pickerTotal = ref(0)
+const pickerRemark = ref('')
+const pickerLoading = ref(false)
+
+// 弹窗打开时按编辑对象或初始成员初始化表单
+watch(() => props.show, (value) => {
+  if (value) {
+    seed()
+    loadNameHistory()
+  } else {
+    showPicker.value = false
+  }
+})
+
+// 切换关系类型时刷新对应类型的历史名称，并在创建模式下记住用户偏好
+watch(editorType, () => {
+  if (props.show) {
+    loadNameHistory()
+    if (editingGroupId.value === null) {
+      savePreferredRelationType(editorType.value)
+    }
+  }
+})
+
+onMounted(loadAiConfig)
+
+/** 读取上次使用的关系类型偏好，非法值或异常回退 PARENT_CHILD */
+function loadPreferredRelationType(): TransactionRelationType {
+  try {
+    const saved = localStorage.getItem(RELATION_TYPE_KEY)
+    return saved === 'PARENT_CHILD' || saved === 'SIBLING' ? saved : 'PARENT_CHILD'
+  } catch (e) {
+    return 'PARENT_CHILD'
+  }
+}
+
+/** 保存关系类型偏好，忽略存储异常 */
+function savePreferredRelationType(type: TransactionRelationType) {
+  try {
+    localStorage.setItem(RELATION_TYPE_KEY, type)
+  } catch (e) {
+    // 忽略存储异常
+  }
+}
+
+/** 加载关系名称历史（按当前关系类型过滤） */
+async function loadNameHistory() {
+  try {
+    const res: any = await getGroupNames(editorType.value)
+    nameOptions.value = (res.data || []).map((name: string) => ({ label: name, value: name }))
+  } catch (e) {
+    nameOptions.value = []
+  }
+}
+
+/** 关系名称下拉选项：按当前输入做不区分大小写的包含过滤，输入为空时显示全部历史 */
+const filteredNameOptions = computed(() => {
+  const keyword = editorName.value.trim().toLowerCase()
+  if (!keyword) {
+    return nameOptions.value
+  }
+  return nameOptions.value.filter((option) => option.label.toLowerCase().includes(keyword))
+})
+
+/** 读取 AI 启用状态，失败时按未启用处理 */
+async function loadAiConfig() {
+  try {
+    const res: any = await getAiConfig()
+    aiEnabled.value = !!res.data?.enabled
+  } catch (e) {
+    aiEnabled.value = false
+  }
+}
+
+/** 初始化表单：编辑时取关系组内容，创建时取预填成员 */
+function seed() {
+  if (props.editingGroup) {
+    const group = props.editingGroup
+    editingGroupId.value = group.id
+    editorType.value = group.type
+    editorName.value = group.name || ''
+    editorRemark.value = group.remark || ''
+    editorMembers.value = group.items.map((item) => ({
+      transactionId: item.transactionId,
+      type: item.type,
+      amount: item.amount,
+      channel: item.channel,
+      remark: item.remark,
+      transactionTime: item.transactionTime,
+      categoryName: item.categoryName,
+      categoryIcon: item.categoryIcon,
+    }))
+    const parent = group.items.find((item) => item.role === 'PARENT')
+    parentId.value = parent ? parent.transactionId : null
+    return
+  }
+  editingGroupId.value = null
+  editorType.value = loadPreferredRelationType()
+  editorName.value = ''
+  editorRemark.value = ''
+  editorMembers.value = props.initialMembers.map((item) => ({ ...item }))
+  const anchor = props.anchorTransactionId
+  if (anchor != null && editorMembers.value.some((item) => item.transactionId === anchor)) {
+    parentId.value = anchor
+  } else {
+    parentId.value = editorMembers.value[0]?.transactionId ?? null
+  }
+}
+
+/** 关闭弹窗（同步 v-model） */
+function onShowChange(value: boolean) {
+  emit('update:show', value)
+}
+
+/** 金额展示 */
+function formatAmount(item: { type: string; amount: number }) {
+  return `${item.type === 'INCOME' ? '+' : '-'}${Number(item.amount ?? 0).toFixed(2)}`
+}
+
+/** 时间展示 */
+function formatTime(time: string) {
+  return time ? time.replace('T', ' ').substring(0, 16) : '-'
+}
+
+/** 从成员列表中移除 */
+function removeMember(transactionId: number) {
+  editorMembers.value = editorMembers.value.filter((item) => item.transactionId !== transactionId)
+  if (parentId.value === transactionId) {
+    parentId.value = null
+  }
+}
+
+/** 根据关系类型与成员账单特征生成关系名称与备注（仅发送白名单字段，不含金额） */
+async function handleAiGenerate() {
+  if (editorMembers.value.length < 2) {
+    message.warning(t('ai.relation.needMembers'))
+    return
+  }
+  aiRelationLoading.value = true
+  try {
+    const res: any = await parseRelationByAi({
+      type: editorType.value,
+      members: editorMembers.value.map((item) => ({
+        type: item.type,
+        channel: getChannelLabel(item.channel),
+        categoryName: item.categoryName,
+        remark: item.remark,
+      })),
+    })
+    const data = res.data
+    if (!data || !data.name) {
+      message.warning(t('ai.relation.failed'))
+      return
+    }
+    editorName.value = data.name
+    if (data.remark) {
+      editorRemark.value = data.remark
+    }
+  } catch (e: any) {
+    message.error(e.message || t('ai.relation.failed'))
+  } finally {
+    aiRelationLoading.value = false
+  }
+}
+
+/** 保存关系组 */
+async function handleSave() {
+  if (editorMembers.value.length < 2) {
+    message.warning(t('transaction.relation.minTwo'))
+    return
+  }
+  if (editorType.value === 'PARENT_CHILD' && !editorMembers.value.some((item) => item.transactionId === parentId.value)) {
+    message.warning(t('transaction.relation.needParent'))
+    return
+  }
+  const payload: TransactionGroupPayload = {
+    type: editorType.value,
+    name: editorName.value || undefined,
+    remark: editorRemark.value || undefined,
+    items: editorMembers.value.map((item, index) => ({
+      transactionId: item.transactionId,
+      role: editorType.value === 'PARENT_CHILD'
+        ? (item.transactionId === parentId.value ? 'PARENT' : 'CHILD')
+        : 'MEMBER',
+      sortOrder: index,
+    })),
+  }
+  saving.value = true
+  try {
+    if (editingGroupId.value) {
+      await updateTransactionGroup(editingGroupId.value, payload)
+      message.success(t('common.updateSuccess'))
+    } else {
+      await createTransactionGroup(payload)
+      message.success(t('common.createSuccess'))
+    }
+    emit('saved')
+    emit('update:show', false)
+  } catch (e: any) {
+    message.error(e.message || t('transaction.relation.saveFailed'))
+  } finally {
+    saving.value = false
+  }
+}
+
+/** 打开选择账单弹窗 */
+function openPicker() {
+  pickerRemark.value = ''
+  showPicker.value = true
+  loadPicker(1)
+}
+
+/** 加载候选账单 */
+async function loadPicker(page: number) {
+  pickerPage.value = page
+  pickerLoading.value = true
+  try {
+    const res: any = await getTransactionPage({
+      page: pickerPage.value,
+      size: pickerSize.value,
+      remark: pickerRemark.value || undefined,
+    })
+    const data = res.data || {}
+    pickerRows.value = (data.records || []).map((row: any) => ({
+      transactionId: row.id,
+      type: row.type,
+      amount: row.amount,
+      channel: row.channel,
+      remark: row.remark,
+      transactionTime: row.transactionTime,
+      categoryName: row.categoryName,
+      categoryIcon: row.categoryIcon,
+    }))
+    pickerTotal.value = data.total || 0
+    pickerChecked.value = []
+  } catch (e: any) {
+    message.error(e.message || t('common.loadFailed'))
+  } finally {
+    pickerLoading.value = false
+  }
+}
+
+/** 确认选择候选账单 */
+function confirmPick() {
+  const existing = new Set(editorMembers.value.map((item) => item.transactionId))
+  for (const id of pickerChecked.value) {
+    if (existing.has(id)) continue
+    const row = pickerRows.value.find((item) => item.transactionId === id)
+    if (row) {
+      editorMembers.value.push({ ...row })
+      existing.add(id)
+    }
+  }
+  showPicker.value = false
+}
+
+/** 候选账单表格列 */
+const pickerColumns = computed<DataTableColumns<RelationMemberDraft>>(() => [
+  { type: 'selection', disabled: (row) => row.transactionId === props.anchorTransactionId },
+  { title: t('transaction.column.transactionTime'), key: 'transactionTime', width: 140, render: (row) => formatTime(row.transactionTime) },
+  {
+    title: t('transaction.column.type'), key: 'type', width: 70,
+    render: (row) => (row.type === 'INCOME' ? t('common.types.income') : t('common.types.expense')),
+  },
+  { title: t('transaction.column.category'), key: 'categoryName', width: 110, render: (row) => row.categoryName || t('transaction.uncategorized') },
+  {
+    title: t('transaction.column.amount'), key: 'amount', width: 100,
+    render: (row) => formatAmount(row),
+  },
+  { title: t('transaction.column.channel'), key: 'channel', width: 90, render: (row) => getChannelLabel(row.channel) },
+  { title: t('transaction.column.remark'), key: 'remark' },
+])
+</script>
+
+<template>
+  <div>
+    <!-- 新建/编辑关系弹窗 -->
+    <NModal
+      :show="show"
+      preset="card"
+      :title="editingGroupId ? t('transaction.relation.editTitle') : t('transaction.relation.createTitle')"
+      style="width: 780px; max-width: 94vw;"
+      @update:show="onShowChange"
+    >
+      <NForm>
+        <NFormItem :label="t('transaction.relation.type')">
+          <NRadioGroup v-model:value="editorType">
+            <NRadio value="PARENT_CHILD">{{ t('transaction.relation.typeParentChild') }}</NRadio>
+            <NRadio value="SIBLING">{{ t('transaction.relation.typeSibling') }}</NRadio>
+          </NRadioGroup>
+        </NFormItem>
+        <NFormItem :label="t('transaction.relation.name')">
+          <div style="display: flex; align-items: center; gap: 8px; width: 100%;">
+            <NAutoComplete
+              v-model:value="editorName"
+              :options="filteredNameOptions"
+              :get-show="() => nameMenuShow"
+              :placeholder="t('transaction.relation.namePlaceholder')"
+              style="flex: 1;"
+              @focus="nameMenuShow = true"
+              @blur="nameMenuShow = false"
+              @select="nameMenuShow = false"
+            />
+            <NButton v-if="aiEnabled" style="flex-shrink: 0;" :loading="aiRelationLoading" @click="handleAiGenerate">
+              {{ t('ai.relation.button') }}
+            </NButton>
+          </div>
+        </NFormItem>
+        <NFormItem :label="t('transaction.relation.remark')">
+          <NInput v-model:value="editorRemark" :placeholder="t('transaction.remarkPlaceholder')" />
+        </NFormItem>
+        <NFormItem :label="t('transaction.relation.members')">
+          <div style="width: 100%;">
+            <NSpace vertical :size="6">
+              <div
+                v-for="member in editorMembers"
+                :key="member.transactionId"
+                style="display: flex; align-items: center; gap: 8px; font-size: 13px;"
+              >
+                <span style="min-width: 130px;">{{ formatTime(member.transactionTime) }}</span>
+                <span style="min-width: 100px;">{{ member.categoryName || t('transaction.uncategorized') }}</span>
+                <span style="flex: 1; color: #999; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;">{{ member.remark || '' }}</span>
+                <span style="font-weight: 600;">{{ formatAmount(member) }}</span>
+                <NRadio
+                  v-if="editorType === 'PARENT_CHILD'"
+                  :checked="parentId === member.transactionId"
+                  @update:checked="() => (parentId = member.transactionId)"
+                >
+                  {{ t('transaction.relation.roleParent') }}
+                </NRadio>
+                <NButton
+                  size="tiny"
+                  :disabled="member.transactionId === anchorTransactionId"
+                  @click="removeMember(member.transactionId)"
+                >
+                  {{ t('common.delete') }}
+                </NButton>
+              </div>
+            </NSpace>
+            <NButton size="small" dashed style="margin-top: 8px;" @click="openPicker">
+              + {{ t('transaction.relation.addMember') }}
+            </NButton>
+          </div>
+        </NFormItem>
+      </NForm>
+      <NButton type="primary" block :loading="saving" @click="handleSave">{{ t('common.confirm') }}</NButton>
+    </NModal>
+
+    <!-- 选择关联账单弹窗 -->
+    <NModal
+      v-model:show="showPicker"
+      preset="card"
+      :title="t('transaction.relation.pickTitle')"
+      style="width: 820px; max-width: 94vw;"
+    >
+      <NSpace align="center" style="margin-bottom: 12px;">
+        <NInput
+          v-model:value="pickerRemark"
+          :placeholder="t('transaction.column.remark')"
+          clearable
+          style="width: 220px;"
+          @keyup.enter="loadPicker(1)"
+        />
+        <NButton @click="loadPicker(1)">{{ t('transaction.search') }}</NButton>
+      </NSpace>
+      <NDataTable
+        v-model:checked-row-keys="pickerChecked"
+        :columns="pickerColumns"
+        :data="pickerRows"
+        :loading="pickerLoading"
+        :row-key="(row: RelationMemberDraft) => row.transactionId"
+        :max-height="420"
+        size="small"
+        :bordered="false"
+      />
+      <NSpace justify="space-between" align="center" style="margin-top: 12px;">
+        <NPagination
+          v-model:page="pickerPage"
+          :page-size="pickerSize"
+          :item-count="pickerTotal"
+          @update:page="loadPicker"
+        />
+        <NSpace>
+          <NButton @click="showPicker = false">{{ t('common.cancel') }}</NButton>
+          <NButton type="primary" @click="confirmPick">{{ t('common.confirm') }}</NButton>
+        </NSpace>
+      </NSpace>
+    </NModal>
+  </div>
+</template>
diff --git a/frontend/src/components/TransactionRelationModal.vue b/frontend/src/components/TransactionRelationModal.vue
new file mode 100644
index 0000000..0d7d027
--- /dev/null
+++ b/frontend/src/components/TransactionRelationModal.vue
@@ -0,0 +1,47 @@
+<script setup lang="ts">
+// 账单关系弹窗组件：包裹关系面板，供交易列表「关系」列快速查看与维护某笔账单的关系
+import { useI18n } from 'vue-i18n'
+import { NModal } from 'naive-ui'
+import TransactionRelationPanel from './TransactionRelationPanel.vue'
+
+/** 当前账单的精简信息 */
+interface CurrentTransaction {
+  id: number
+  type: string
+  amount: number
+  channel: string
+  remark: string
+  transactionTime: string
+  categoryName: string
+  categoryIcon: string
+}
+
+const props = defineProps<{
+  show: boolean
+  transaction: CurrentTransaction | null
+}>()
+
+const emit = defineEmits<{
+  (e: 'update:show', value: boolean): void
+  (e: 'changed'): void
+}>()
+
+const { t } = useI18n()
+
+/** 同步弹窗显示状态 */
+function onShowChange(value: boolean) {
+  emit('update:show', value)
+}
+</script>
+
+<template>
+  <NModal
+    :show="show"
+    preset="card"
+    :title="t('transaction.relation.title')"
+    style="width: 860px; max-width: 94vw;"
+    @update:show="onShowChange"
+  >
+    <TransactionRelationPanel :transaction="transaction" @changed="emit('changed')" />
+  </NModal>
+</template>
diff --git a/frontend/src/components/TransactionRelationPanel.vue b/frontend/src/components/TransactionRelationPanel.vue
new file mode 100644
index 0000000..263f8ee
--- /dev/null
+++ b/frontend/src/components/TransactionRelationPanel.vue
@@ -0,0 +1,472 @@
+<script setup lang="ts">
+// 账单关系面板组件：展示某笔账单的父子/同级关系，并支持新建、编辑、删除关系组（内嵌于详情弹窗）
+import { ref, computed, watch, onMounted } from 'vue'
+import { useI18n } from 'vue-i18n'
+import { useMessage, useDialog, NCard, NSpace, NButton, NTag, NSpin, NEmpty } from 'naive-ui'
+import { getGroupsByTransaction, deleteTransactionGroup } from '../api/transactionGroup'
+import type { TransactionGroup, TransactionGroupItem, RelationMemberDraft } from '../api/transactionGroup'
+import TransactionRelationEditorModal from './TransactionRelationEditorModal.vue'
+
+/** 当前账单的精简信息（由详情弹窗传入） */
+interface CurrentTransaction {
+  id: number
+  type: string
+  amount: number
+  channel: string
+  remark: string
+  transactionTime: string
+  categoryName: string
+  categoryIcon: string
+}
+
+/** SVG 画布逻辑宽度（配合 preserveAspectRatio 自适应缩放，避免裁切） */
+const VB_W = 820
+/** 普通节点半径 */
+const NODE_R = 32
+/** 当前账单节点半径（描边高亮） */
+const NODE_R_CURRENT = 36
+/** 连线端点与节点之间预留的间距（为箭头留出空间） */
+const EDGE_MARGIN = 12
+/** 左右安全边距 */
+const PADDING_X = 60
+/** 同行相邻节点圆心间距（大于节点直径，避免重叠） */
+const SPACING_X = 92
+/** 相邻两行圆心间距 */
+const ROW_GAP = 84
+/** 支出/流入颜色：支出红、收入绿 */
+const COLOR_EXPENSE = '#d03050'
+const COLOR_INCOME = '#18a058'
+
+/** 关系图节点 */
+interface LayoutNode {
+  item: TransactionGroupItem
+  cx: number
+  cy: number
+  r: number
+  color: string
+  isCurrent: boolean
+  amountText: string
+  roleText: string
+}
+
+/** 关系图连线 */
+interface LayoutEdge {
+  x1: number
+  y1: number
+  x2: number
+  y2: number
+}
+
+/** 关系图边标签 */
+interface LayoutLabel {
+  x: number
+  y: number
+  text: string
+}
+
+/** 单个关系组的布局结果 */
+interface GraphLayout {
+  width: number
+  height: number
+  nodes: LayoutNode[]
+  edges: LayoutEdge[]
+  labels: LayoutLabel[]
+}
+
+const props = defineProps<{
+  transaction: CurrentTransaction | null
+}>()
+
+const emit = defineEmits<{
+  (e: 'changed'): void
+}>()
+
+const { t } = useI18n()
+const message = useMessage()
+const dialog = useDialog()
+
+// 关系组列表状态
+const groups = ref<TransactionGroup[]>([])
+const loading = ref(false)
+
+// 编辑弹窗状态
+const showEditor = ref(false)
+const editingGroup = ref<TransactionGroup | null>(null)
+const initialMembers = ref<RelationMemberDraft[]>([])
+
+onMounted(loadGroups)
+// 切换查看的账单时重新加载关系
+watch(() => props.transaction?.id, () => {
+  showEditor.value = false
+  loadGroups()
+})
+
+/** 加载当前账单的关系组 */
+async function loadGroups() {
+  if (!props.transaction) {
+    groups.value = []
+    return
+  }
+  loading.value = true
+  try {
+    const res: any = await getGroupsByTransaction(props.transaction.id)
+    groups.value = res.data || []
+  } catch (e: any) {
+    message.error(e.message || t('transaction.relation.loadFailed'))
+  } finally {
+    loading.value = false
+  }
+}
+
+/** 关系组与布局的对应列表（布局随语言/数据响应式重算） */
+const groupLayouts = computed(() => groups.value.map((group) => ({ group, layout: buildLayout(group) })))
+
+/** 按收支方向取色：支出红、收入绿 */
+function nodeColor(item: { type: string }) {
+  return item.type === 'INCOME' ? COLOR_INCOME : COLOR_EXPENSE
+}
+
+/** 角色文案 */
+function roleLabel(role: string) {
+  if (role === 'PARENT') return t('transaction.relation.roleParent')
+  if (role === 'CHILD') return t('transaction.relation.roleChild')
+  return t('transaction.relation.roleMember')
+}
+
+/** 金额展示（成员列表用） */
+function formatAmount(item: { type: string; amount: number }) {
+  return `${item.type === 'INCOME' ? '+' : '-'}${Number(item.amount ?? 0).toFixed(2)}`
+}
+
+/** 节点内金额：绝对值 ≥ 1000 时省略小数，避免文字拥挤 */
+function formatNodeAmount(item: { type: string; amount: number }) {
+  const value = Number(item.amount ?? 0)
+  const text = Math.abs(value) >= 1000 ? value.toFixed(0) : value.toFixed(2)
+  return `${item.type === 'INCOME' ? '+' : '-'}${text}`
+}
+
+/** 时间展示 */
+function formatTime(time: string) {
+  return time ? time.replace('T', ' ').substring(0, 16) : '-'
+}
+
+/** 节点下方说明：优先备注，其次分类，超长截断 */
+function caption(item: TransactionGroupItem) {
+  const text = item.remark || item.categoryName || ''
+  return text.length > 10 ? text.slice(0, 10) + '…' : text
+}
+
+/** 节点原生 tooltip 文本 */
+function tooltipText(item: TransactionGroupItem) {
+  const typeLabel = item.type === 'INCOME' ? t('common.types.income') : t('common.types.expense')
+  return [
+    `${typeLabel} ${Number(item.amount ?? 0).toFixed(2)}`,
+    `${t('transaction.column.category')}: ${item.categoryName || t('transaction.uncategorized')}`,
+    `${t('transaction.column.remark')}: ${item.remark || '-'}`,
+    `${t('transaction.column.transactionTime')}: ${formatTime(item.transactionTime)}`,
+  ].join('\n')
+}
+
+/** 每行最多可放置的节点数（按固定间距计算，保证不重叠） */
+function nodesPerRow(): number {
+  const available = VB_W - PADDING_X * 2
+  return Math.max(1, Math.floor(available / SPACING_X) + 1)
+}
+
+/** 将列表按每行容量切分为多行 */
+function chunkRows<T>(list: T[], size: number): T[][] {
+  const rows: T[][] = []
+  for (let i = 0; i < list.length; i += size) {
+    rows.push(list.slice(i, i + size))
+  }
+  return rows
+}
+
+/** 在画布宽度内居中均匀分布一行节点，返回各节点 x 坐标 */
+function rowXs(count: number): number[] {
+  if (count <= 0) return []
+  if (count === 1) return [VB_W / 2]
+  const span = SPACING_X * (count - 1)
+  const startX = (VB_W - span) / 2
+  return Array.from({ length: count }, (_, index) => startX + index * SPACING_X)
+}
+
+/** 构建布局节点 */
+function makeLayoutNode(item: TransactionGroupItem, cx: number, cy: number, roleText: string): LayoutNode {
+  const isCurrent = item.transactionId === props.transaction?.id
+  return {
+    item,
+    cx,
+    cy,
+    r: isCurrent ? NODE_R_CURRENT : NODE_R,
+    color: nodeColor(item),
+    isCurrent,
+    amountText: formatNodeAmount(item),
+    roleText,
+  }
+}
+
+/** 计算两节点之间带端点间距的连线（为箭头预留空间） */
+function edgeBetween(from: LayoutNode, to: LayoutNode): LayoutEdge {
+  const dx = to.cx - from.cx
+  const dy = to.cy - from.cy
+  const len = Math.hypot(dx, dy) || 1
+  const ux = dx / len
+  const uy = dy / len
+  return {
+    x1: from.cx + ux * (from.r + 2),
+    y1: from.cy + uy * (from.r + 2),
+    x2: to.cx - ux * (to.r + EDGE_MARGIN),
+    y2: to.cy - uy * (to.r + EDGE_MARGIN),
+  }
+}
+
+/** 构建某个关系组的 SVG 布局（成员较多时自动换行，避免节点重叠） */
+function buildLayout(group: TransactionGroup): GraphLayout {
+  const nodes: LayoutNode[] = []
+  const edges: LayoutEdge[] = []
+  const labels: LayoutLabel[] = []
+  const perRow = nodesPerRow()
+  let lastCy = 0
+
+  if (group.type === 'PARENT_CHILD') {
+    const parent = group.items.find((item) => item.role === 'PARENT')
+    const children = group.items.filter((item) => item.role !== 'PARENT')
+    const parentNode = parent ? makeLayoutNode(parent, VB_W / 2, 52, roleLabel(parent.role)) : null
+    if (parentNode) {
+      nodes.push(parentNode)
+    }
+    let cy = parentNode ? 156 : 70
+    chunkRows(children, perRow).forEach((rowItems) => {
+      const xs = rowXs(rowItems.length)
+      rowItems.forEach((child, index) => {
+        const childNode = makeLayoutNode(child, xs[index], cy, roleLabel(child.role))
+        nodes.push(childNode)
+        if (parentNode) {
+          edges.push(edgeBetween(parentNode, childNode))
+        }
+      })
+      lastCy = cy
+      cy += ROW_GAP
+    })
+  } else {
+    const nodeList: LayoutNode[] = []
+    let cy = 70
+    chunkRows(group.items, perRow).forEach((rowItems) => {
+      const xs = rowXs(rowItems.length)
+      rowItems.forEach((item, index) => {
+        nodeList.push(makeLayoutNode(item, xs[index], cy, ''))
+      })
+      lastCy = cy
+      cy += ROW_GAP
+    })
+    nodeList.forEach((node) => nodes.push(node))
+    for (let i = 1; i < nodeList.length; i++) {
+      edges.push(edgeBetween(nodeList[i - 1], nodeList[i]))
+      labels.push({
+        x: (nodeList[i - 1].cx + nodeList[i].cx) / 2,
+        y: (nodeList[i - 1].cy + nodeList[i].cy) / 2 - 10,
+        text: t('transaction.relation.edgeLabel'),
+      })
+    }
+  }
+
+  const height = Math.max(lastCy + NODE_R + 34, 180)
+  return { width: VB_W, height, nodes, edges, labels }
+}
+
+/** 由当前账单构造成员草稿 */
+function currentAsMember(): RelationMemberDraft {
+  const tx = props.transaction!
+  return {
+    transactionId: tx.id,
+    type: tx.type,
+    amount: tx.amount,
+    channel: tx.channel,
+    remark: tx.remark,
+    transactionTime: tx.transactionTime,
+    categoryName: tx.categoryName,
+    categoryIcon: tx.categoryIcon,
+  }
+}
+
+/** 打开新建关系弹窗 */
+function openCreate() {
+  editingGroup.value = null
+  initialMembers.value = props.transaction ? [currentAsMember()] : []
+  showEditor.value = true
+}
+
+/** 打开编辑关系弹窗 */
+function openEdit(group: TransactionGroup) {
+  editingGroup.value = group
+  initialMembers.value = []
+  showEditor.value = true
+}
+
+/** 编辑保存后刷新关系组并通知外部 */
+async function onEditorSaved() {
+  await loadGroups()
+  emit('changed')
+}
+
+/** 删除关系组 */
+function handleDeleteGroup(group: TransactionGroup) {
+  dialog.warning({
+    title: t('common.confirmDelete'),
+    content: t('transaction.relation.deleteConfirm'),
+    positiveText: t('common.confirm'),
+    negativeText: t('common.cancel'),
+    onPositiveClick: async () => {
+      try {
+        await deleteTransactionGroup(group.id)
+        message.success(t('common.deleteSuccess'))
+        await loadGroups()
+        emit('changed')
+      } catch (e: any) {
+        message.error(e.message || t('transaction.relation.deleteFailed'))
+      }
+    },
+  })
+}
+</script>
+
+<template>
+  <div>
+    <div style="display: flex; justify-content: flex-end; margin-bottom: 8px;">
+      <NButton type="primary" size="small" @click="openCreate">{{ t('transaction.relation.create') }}</NButton>
+    </div>
+
+    <NSpin :show="loading">
+      <NEmpty v-if="groups.length === 0" :description="t('transaction.relation.empty')" style="padding: 16px 0;" />
+
+      <NSpace v-else vertical :size="12">
+        <NCard v-for="entry in groupLayouts" :key="entry.group.id" size="small" embedded>
+          <template #header>
+            <NSpace align="center" :size="8">
+              <NTag :type="entry.group.type === 'PARENT_CHILD' ? 'warning' : 'info'" size="small">
+                {{ entry.group.type === 'PARENT_CHILD' ? t('transaction.relation.typeParentChild') : t('transaction.relation.typeSibling') }}
+              </NTag>
+              <span style="font-weight: 600;">{{ entry.group.name || '-' }}</span>
+            </NSpace>
+          </template>
+          <template #header-extra>
+            <NSpace :size="4">
+              <NButton size="tiny" @click="openEdit(entry.group)">{{ t('common.edit') }}</NButton>
+              <NButton size="tiny" type="error" @click="handleDeleteGroup(entry.group)">{{ t('common.delete') }}</NButton>
+            </NSpace>
+          </template>
+
+          <svg class="relation-graph" :viewBox="`0 0 ${entry.layout.width} ${entry.layout.height}`" preserveAspectRatio="xMidYMid meet">
+            <defs>
+              <marker
+                :id="`rel-arrow-${entry.group.id}`"
+                markerWidth="8"
+                markerHeight="8"
+                refX="7"
+                refY="4"
+                orient="auto"
+                markerUnits="userSpaceOnUse"
+              >
+                <path d="M0,0 L8,4 L0,8 z" fill="#b0b6bd" />
+              </marker>
+            </defs>
+            <line
+              v-for="(edge, index) in entry.layout.edges"
+              :key="`edge-${index}`"
+              :x1="edge.x1"
+              :y1="edge.y1"
+              :x2="edge.x2"
+              :y2="edge.y2"
+              stroke="#c0c4cc"
+              stroke-width="1.5"
+              :marker-end="`url(#rel-arrow-${entry.group.id})`"
+            />
+            <text
+              v-for="(label, index) in entry.layout.labels"
+              :key="`label-${index}`"
+              :x="label.x"
+              :y="label.y"
+              text-anchor="middle"
+              font-size="11"
+              fill="#909399"
+            >
+              {{ label.text }}
+            </text>
+            <g v-for="node in entry.layout.nodes" :key="node.item.transactionId">
+              <title>{{ tooltipText(node.item) }}</title>
+              <circle
+                :cx="node.cx"
+                :cy="node.cy"
+                :r="node.r"
+                :fill="node.color"
+                :stroke="node.isCurrent ? '#2080f0' : '#ffffff'"
+                :stroke-width="node.isCurrent ? 3 : 1.5"
+              />
+              <text
+                :x="node.cx"
+                :y="node.cy + 4"
+                text-anchor="middle"
+                font-size="11"
+                font-weight="600"
+                fill="#ffffff"
+              >
+                {{ node.amountText }}
+              </text>
+              <text
+                v-if="node.roleText"
+                :x="node.cx"
+                :y="node.cy - node.r - 10"
+                text-anchor="middle"
+                font-size="10"
+                fill="#606266"
+              >
+                {{ node.roleText }}
+              </text>
+              <text
+                :x="node.cx"
+                :y="node.cy + node.r + 16"
+                text-anchor="middle"
+                font-size="11"
+                fill="#909399"
+              >
+                {{ caption(node.item) }}
+              </text>
+            </g>
+          </svg>
+
+          <NSpace vertical :size="4" style="margin-top: 8px;">
+            <div v-for="item in entry.group.items" :key="item.transactionId" style="font-size: 13px;">
+              <NTag size="tiny" :bordered="false" :color="{ color: nodeColor(item), textColor: '#fff' }">
+                {{ roleLabel(item.role) }}
+              </NTag>
+              <span style="margin-left: 8px;">{{ formatTime(item.transactionTime) }}</span>
+              <span style="margin-left: 8px;">{{ item.categoryName || t('transaction.uncategorized') }}</span>
+              <span style="margin-left: 8px; color: #999;">{{ item.remark || '' }}</span>
+              <span style="margin-left: 8px; font-weight: 600;">{{ formatAmount(item) }}</span>
+            </div>
+          </NSpace>
+        </NCard>
+      </NSpace>
+    </NSpin>
+
+    <!-- 新建/编辑关系弹窗 -->
+    <TransactionRelationEditorModal
+      v-model:show="showEditor"
+      :editing-group="editingGroup"
+      :initial-members="initialMembers"
+      :anchor-transaction-id="transaction?.id ?? null"
+      @saved="onEditorSaved"
+    />
+  </div>
+</template>
+
+<style scoped>
+/* 关系图：随容器宽度等比缩放；成员较多时高度随行数增加，过高则整体缩放，避免节点重叠 */
+.relation-graph {
+  display: block;
+  width: 100%;
+  height: auto;
+  max-height: 420px;
+}
+</style>
diff --git a/frontend/src/locales/messages.ts b/frontend/src/locales/messages.ts
index ec242fc..a3066d8 100644
--- a/frontend/src/locales/messages.ts
+++ b/frontend/src/locales/messages.ts
@@ -369,6 +369,8 @@ export default {
       amountAsc: { zh: '金额（低→高）', en: 'Amount (Low to High)', ja: '金額（低い順）' },
     },
     batchSet: { zh: '一键设置', en: 'Batch Set', ja: '一括設定' },
+    batchMode: { zh: '批量操作', en: 'Batch', ja: '一括操作' },
+    exitBatchMode: { zh: '退出批量', en: 'Exit Batch', ja: '一括終了' },
     importBill: { zh: '导入账单', en: 'Import Bill', ja: '明細をインポート' },
     exportExcel: { zh: '导出 Excel', en: 'Export Excel', ja: 'Excel をエクスポート' },
     addRecord: { zh: '新增记录', en: 'Add Record', ja: '記録を追加' },
@@ -462,6 +464,49 @@ export default {
       yes: { zh: '计入', en: 'Included', ja: '含める' },
       no: { zh: '不计入', en: 'Excluded', ja: '含めない' },
     },
+    relation: {
+      column: { zh: '关系', en: 'Relation', ja: '関連' },
+      viewCount: { zh: '{count} 个关系', en: '{count} relation(s)', ja: '{count} 件の関連' },
+      none: { zh: '-', en: '-', ja: '-' },
+      createFromSelection: { zh: '建立关系', en: 'Create Relation', ja: '関連を作成' },
+      selectAtLeastTwo: { zh: '请至少勾选两条账单', en: 'Please select at least two bills', ja: '明細を2件以上選択してください' },
+      title: { zh: '账单关系', en: 'Bill Relations', ja: '明細の関連' },
+      create: { zh: '新建关系', en: 'New Relation', ja: '関連を作成' },
+      createTitle: { zh: '新建账单关系', en: 'New Bill Relation', ja: '明細の関連を作成' },
+      editTitle: { zh: '编辑账单关系', en: 'Edit Bill Relation', ja: '明細の関連を編集' },
+      empty: { zh: '暂无关联账单', en: 'No related bills', ja: '関連する明細はありません' },
+      type: { zh: '关系类型', en: 'Relation Type', ja: '関連タイプ' },
+      typeParentChild: { zh: '父子关系', en: 'Parent-Child', ja: '親子関係' },
+      typeSibling: { zh: '同级关系', en: 'Sibling', ja: '同級関係' },
+      name: { zh: '关系名称', en: 'Relation Name', ja: '関連名' },
+      namePlaceholder: { zh: '可选，如「交通卡充值」', en: 'Optional, e.g. "Transit card top-up"', ja: '任意（例：交通カードのチャージ）' },
+      remark: { zh: '备注', en: 'Remark', ja: '備考' },
+      members: { zh: '关联账单', en: 'Related Bills', ja: '関連する明細' },
+      addMember: { zh: '添加账单', en: 'Add Bill', ja: '明細を追加' },
+      pickTitle: { zh: '选择关联账单', en: 'Select Bills', ja: '明細を選択' },
+      roleParent: { zh: '父账单', en: 'Parent', ja: '親' },
+      roleChild: { zh: '子账单', en: 'Child', ja: '子' },
+      roleMember: { zh: '成员', en: 'Member', ja: 'メンバー' },
+      edgeLabel: { zh: '关联', en: 'Linked', ja: '関連' },
+      minTwo: { zh: '关系组至少包含两条账单', en: 'A relation group needs at least two bills', ja: '関連グループには最低2件の明細が必要です' },
+      needParent: { zh: '请指定一条父账单', en: 'Please select one parent bill', ja: '親の明細を1件指定してください' },
+      deleteConfirm: { zh: '确定删除该关系组？仅解除关联，不会删除账单', en: 'Delete this relation group? Only the relation is removed, not the bills', ja: 'この関連グループを削除しますか？明細は削除されません' },
+      saveFailed: { zh: '保存账单关系失败', en: 'Failed to save the relation', ja: '関連の保存に失敗しました' },
+      loadFailed: { zh: '加载账单关系失败', en: 'Failed to load relations', ja: '関連の読み込みに失敗しました' },
+      deleteFailed: { zh: '删除账单关系失败', en: 'Failed to delete the relation', ja: '関連の削除に失敗しました' },
+    },
+    detail: {
+      button: { zh: '详情', en: 'Details', ja: '詳細' },
+      title: { zh: '账单详情', en: 'Bill Details', ja: '明細の詳細' },
+      basicInfo: { zh: '基本信息', en: 'Basic Info', ja: '基本情報' },
+      relations: { zh: '账单关系', en: 'Bill Relations', ja: '明細の関連' },
+      images: { zh: '来源图片', en: 'Source Images', ja: '元の画像' },
+      rawData: { zh: '原始数据', en: 'Raw Data', ja: '元データ' },
+      createdAt: { zh: '创建时间', en: 'Created', ja: '作成日時' },
+      noTags: { zh: '无标签', en: 'No tags', ja: 'タグなし' },
+      noImages: { zh: '无来源图片', en: 'No source images', ja: '元の画像はありません' },
+      noRawData: { zh: '无原始数据', en: 'No raw data', ja: '元データはありません' },
+    },
   },
 
   // 分类管理
@@ -735,6 +780,11 @@ export default {
       needInfo: { zh: '请先填写备注或金额，便于生成标签', en: 'Please fill in a remark or amount first', ja: 'タグ生成のため、先に備考または金額を入力してください' },
       failed: { zh: 'AI 生成标签失败', en: 'Failed to generate tag', ja: 'AI によるタグ生成に失敗しました' },
     },
+    relation: {
+      button: { zh: 'AI 生成', en: 'AI Generate', ja: 'AI 生成' },
+      needMembers: { zh: '请先选择至少两条关联账单', en: 'Please select at least two related bills first', ja: '関連する明細を2件以上選択してください' },
+      failed: { zh: 'AI 未能生成关系名称，请重试', en: 'AI failed to generate a relation name', ja: 'AI が関連名を生成できませんでした' },
+    },
     query: {
       placeholder: { zh: '用自然语言查询，如：上个月餐饮花了多少', en: 'Ask in natural language, e.g. dining expenses last month', ja: '自然言語で検索（例：先月の食費はいくら）' },
       examples: { zh: '上个月餐饮|超过500的支出|待报销的支出|微信支付', en: 'Dining last month|Expenses over 500|Pending reimbursement|Paid by WeChat', ja: '先月の食費|500を超える支出|精算待ちの支出|WeChat 払い' },
@@ -830,7 +880,15 @@ export default {
         suggest: { zh: '生成建议', en: 'Suggest', ja: '提案生成' },
         decorate: { zh: '图标配色', en: 'Icon & Color', ja: 'アイコンと配色' },
         category: { zh: '生成分类', en: 'Category', ja: 'カテゴリ生成' },
+        tag: { zh: '生成标签', en: 'Tag', ja: 'タグ生成' },
+        channel: { zh: '生成渠道', en: 'Channel', ja: 'チャネル生成' },
         test: { zh: '测试连接', en: 'Test', ja: '接続テスト' },
+        query: { zh: '智能查询', en: 'Query', ja: 'スマート検索' },
+        record: { zh: '智能记账', en: 'Record', ja: 'スマート記帳' },
+        record_image: { zh: '图片记账', en: 'Image Record', ja: '画像記帳' },
+        rule: { zh: '生成规则', en: 'Rule', ja: 'ルール生成' },
+        statistics: { zh: '统计搜索', en: 'Statistics', ja: '統計検索' },
+        relation: { zh: '生成关系', en: 'Relation', ja: '関連生成' },
       },
       column: {
         time: { zh: '时间', en: 'Time', ja: '日時' },
diff --git a/frontend/src/views/TransactionList.vue b/frontend/src/views/TransactionList.vue
index 32b34c0..3cde0bd 100644
--- a/frontend/src/views/TransactionList.vue
+++ b/frontend/src/views/TransactionList.vue
@@ -3,11 +3,11 @@
 import { ref, onMounted, onBeforeUnmount, computed, h, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { useRouter } from 'vue-router'
-import { useMessage, useDialog, NButton, NSpace, NDataTable, NTag, NModal, NForm, NFormItem, NInput, NInputNumber, NSelect, NDatePicker, NPagination, NCard, NSwitch, NIcon, NPopover, NAutoComplete, NAlert, NDivider, NDropdown, NUpload, NUploadDragger, NTabs, NTabPane, NSpin } from 'naive-ui'
+import { useMessage, useDialog, NButton, NSpace, NDataTable, NTag, NModal, NForm, NFormItem, NInput, NInputNumber, NSelect, NDatePicker, NPagination, NCard, NSwitch, NIcon, NPopover, NAutoComplete, NAlert, NDivider, NDropdown, NUpload, NUploadDragger, NTabs, NTabPane } from 'naive-ui'
 import { EyeOutline, EyeOffOutline, SparklesOutline, BulbOutline, RefreshOutline, CloudUploadOutline, CheckmarkCircleOutline } from '@vicons/ionicons5'
 import type { DataTableColumns, UploadFileInfo } from 'naive-ui'
 import { getTransactionPage, createTransaction, updateTransaction, deleteTransaction, exportTransaction, toggleTransactionStats, toggleRemarkHidden, batchUpdateCategory, batchTags, getChannels, batchDeleteTransactions, batchCreateTransactions } from '../api/transaction'
-import { getAiConfig, suggestByAi, suggestOneByAi, applyAiSuggestions, queryByAi, parseRecordByAi, parseCategoryByAi, parseTagByAi, parseChannelByAi, getAiImageBlob } from '../api/ai'
+import { getAiConfig, suggestByAi, suggestOneByAi, applyAiSuggestions, queryByAi, parseRecordByAi, parseCategoryByAi, parseTagByAi, parseChannelByAi } from '../api/ai'
 import { createChannel } from '../api/channel'
 import type { AiSuggestion, AiQueryResult, AiRecordResult, AiRecordImageResult } from '../api/ai'
 import { getExcludedDisplayStyle } from '../api/setting'
@@ -18,6 +18,10 @@ import { renderCategoryLabel } from '../utils/render'
 import { useKeywordHistory } from '../composables/useKeywordHistory'
 import { openSse } from '../utils/sse'
 import BillImportModal from './BillImportModal.vue'
+import TransactionDetailModal from '../components/TransactionDetailModal.vue'
+import TransactionRelationEditorModal from '../components/TransactionRelationEditorModal.vue'
+import TransactionRelationModal from '../components/TransactionRelationModal.vue'
+import type { RelationMemberDraft } from '../api/transactionGroup'
 
 const message = useMessage() // 消息提示
 const dialog = useDialog() // 对话框
@@ -41,6 +45,8 @@ interface TransactionItem {
   tags: TagOption[]
   /** 来源图片ID列表（图片记账生成时存在） */
   imageIds: number[]
+  /** 所属关系组数量（父子/同级关系） */
+  relationGroupCount: number
   createdAt: string
 }
 
@@ -125,6 +131,12 @@ const excludedDisplayStyle = ref<'strikethrough' | 'muted'>('strikethrough')
 const submitting = ref(false) // 表单提交状态
 const showModal = ref(false) // 新增/编辑弹窗显示状态
 const showImportModal = ref(false) // 账单导入弹窗显示状态
+const showDetailModal = ref(false) // 账单详情弹窗显示状态
+const detailTransaction = ref<TransactionItem | null>(null) // 当前查看详情的账单
+const showRelationEditor = ref(false) // 勾选账单建立关系弹窗显示状态
+const relationEditorMembers = ref<RelationMemberDraft[]>([]) // 建立关系时的预填成员
+const showRelationModal = ref(false) // 关系查看弹窗显示状态
+const relationTransaction = ref<TransactionItem | null>(null) // 当前查看关系的账单
 const showBatchModal = ref(false) // 批量设置分类弹窗显示状态
 const showAiModal = ref(false) // AI 建议弹窗显示状态
 const aiEnabled = ref(false) // AI 建议是否启用
@@ -226,18 +238,6 @@ const checkedAiRecordKeys = ref<number[]>([]) // 图片识别结果勾选的行
 const aiRecordImporting = ref(false) // 图片记账导入状态
 const aiRecordProgress = ref<{ time: string; text: string }[]>([]) // 图片识别进度日志（含接收时间）
 let aiRecordStreamController: AbortController | null = null // 图片识别 SSE 连接控制器
-const showImageViewModal = ref(false) // 来源图片查看弹窗显示状态
-
-/** 来源图片查看项：默认加载缩略图，用户可按需切换为原图 */
-interface ImageViewItem {
-  id: number // 图片ID
-  url: string // 当前展示的 objectURL
-  isOriginal: boolean // 是否已加载原图
-  loading: boolean // 原图加载状态
-}
-
-const imageViewItems = ref<ImageViewItem[]>([]) // 来源图片列表
-const imageViewLoading = ref(false) // 来源图片加载状态
 const showRawModal = ref(false) // 原始账单数据弹窗显示状态
 const rawDataText = ref('') // 格式化后的原始账单数据文本
 const batchExpenseCategoryId = ref<number | null>(null) // 批量设置的支出分类
@@ -261,6 +261,7 @@ const categories = ref<CategoryOption[]>([]) // 分类选项列表
 const allTags = ref<TagOption[]>([]) // 全部标签（用于筛选、编辑、批量）
 const revealedRemarkIds = ref<number[]>([]) // 临时展开查看原文的备注行 ID（不持久，刷新/翻页后重置）
 const checkedTransactionIds = ref<number[]>([]) // 表格多选选中的记录ID（用于批量删除）
+const selectionMode = ref(false) // 批量选择模式：开启后才显示多选列
 
 // 表单数据（新增/编辑共用）
 const form = ref({
@@ -509,8 +510,8 @@ function createColumns(): DataTableColumns<TransactionItem> {
   // 读取展示样式，使列配置随样式偏好变化而重新计算
   const muted = excludedDisplayStyle.value === 'muted'
   return [
-    // 多选列：用于批量操作（如批量删除）
-    { type: 'selection' },
+    // 多选列：仅在批量选择模式下显示，默认不渲染复选框
+    ...(selectionMode.value ? [{ type: 'selection' as const }] : []),
     {
       // 序号列：按分页计算全局序号
       title: t('transaction.column.index'), key: 'index', width: 70, align: 'center',
@@ -601,13 +602,13 @@ function createColumns(): DataTableColumns<TransactionItem> {
       },
     },
     {
-      title: t('transaction.sourceImages'), key: 'imageIds', width: 110, align: 'center',
+      title: t('transaction.relation.column'), key: 'relationGroupCount', width: 110, align: 'center',
       render(row) {
-        if (!row.imageIds || row.imageIds.length === 0) {
-          return h('span', { style: { color: '#ccc' } }, '-')
+        if (!row.relationGroupCount) {
+          return h('span', { style: { color: '#ccc' } }, t('transaction.relation.none'))
         }
-        return h(NButton, { size: 'small', quaternary: true, type: 'primary', onClick: () => openImageView(row.imageIds) },
-          { default: () => t('transaction.viewImages', { count: row.imageIds.length }) })
+        return h(NButton, { size: 'small', quaternary: true, type: 'info', onClick: () => openRelation(row) },
+          { default: () => t('transaction.relation.viewCount', { count: row.relationGroupCount }) })
       },
     },
     {
@@ -615,8 +616,8 @@ function createColumns(): DataTableColumns<TransactionItem> {
       render(row) {
         return h(NSpace, null, {
           default: () => [
+            h(NButton, { size: 'small', onClick: () => openDetail(row) }, { default: () => t('transaction.detail.button') }),
             h(NButton, { size: 'small', onClick: () => handleEdit(row) }, { default: () => t('common.edit') }),
-            h(NButton, { size: 'small', disabled: !row.rawData, onClick: () => handleViewRaw(row) }, { default: () => t('transaction.rawData') }),
             h(NButton, { size: 'small', type: 'error', onClick: () => handleDelete(row.id) }, { default: () => t('common.delete') }),
           ],
         })
@@ -711,18 +712,49 @@ watch(sortValue, () => {
   fetchData()
 })
 
-/** 查看某条记录的原始账单数据（格式化为缩进 JSON） */
-function handleViewRaw(row: TransactionItem) {
-  if (!row.rawData) {
-    message.warning(t('transaction.noRawData'))
+/** 打开账单详情弹窗 */
+function openDetail(row: TransactionItem) {
+  detailTransaction.value = row
+  showDetailModal.value = true
+}
+
+/** 打开账单关系弹窗 */
+function openRelation(row: TransactionItem) {
+  relationTransaction.value = row
+  showRelationModal.value = true
+}
+
+/** 从详情弹窗进入编辑 */
+function handleDetailEdit() {
+  if (detailTransaction.value) {
+    showDetailModal.value = false
+    handleEdit(detailTransaction.value)
+  }
+}
+
+/** 以表格勾选的账单为成员，打开建立关系弹窗 */
+function handleCreateRelation() {
+  if (checkedTransactionIds.value.length < 2) {
+    message.warning(t('transaction.relation.selectAtLeastTwo'))
     return
   }
-  try {
-    rawDataText.value = JSON.stringify(JSON.parse(row.rawData), null, 2)
-  } catch (e) {
-    rawDataText.value = row.rawData
-  }
-  showRawModal.value = true
+  const selected = transactions.value.filter((row) => checkedTransactionIds.value.includes(row.id))
+  relationEditorMembers.value = selected.map((row) => ({
+    transactionId: row.id,
+    type: row.type,
+    amount: row.amount,
+    channel: row.channel,
+    remark: row.remark,
+    transactionTime: row.transactionTime,
+    categoryName: row.categoryName,
+    categoryIcon: row.categoryIcon,
+  }))
+  showRelationEditor.value = true
+}
+
+/** 建立关系保存成功后刷新列表（选择随刷新清空） */
+function onRelationEditorSaved() {
+  fetchData()
 }
 
 /** 查看图片记账结果行的原始数据（格式化为缩进 JSON） */
@@ -736,57 +768,6 @@ function handleViewAiRecordRaw(row: AiRecordEditRow) {
   showRawModal.value = true
 }
 
-/** 从接口响应中提取图片 Blob（blob 响应经拦截器后返回完整 axios response，需取其 data） */
-function extractBlob(res: any): Blob {
-  return res?.data instanceof Blob ? res.data : (res instanceof Blob ? res : new Blob([res]))
-}
-
-/** 查看交易记录的来源图片（默认加载缩略图，避免大图拖慢打开速度） */
-async function openImageView(imageIds: number[]) {
-  if (!imageIds || imageIds.length === 0) return
-  closeImageView()
-  showImageViewModal.value = true
-  imageViewLoading.value = true
-  try {
-    const items: ImageViewItem[] = []
-    for (const id of imageIds) {
-      const res: any = await getAiImageBlob(id, true)
-      items.push({ id, url: URL.createObjectURL(extractBlob(res)), isOriginal: false, loading: false })
-    }
-    imageViewItems.value = items
-  } catch (e: any) {
-    message.error(e.message || t('common.loadFailed'))
-  } finally {
-    imageViewLoading.value = false
-  }
-}
-
-/** 将指定来源图片切换为原图（替换并释放旧缩略图 objectURL） */
-async function loadOriginalImage(item: ImageViewItem) {
-  if (item.isOriginal || item.loading) return
-  item.loading = true
-  try {
-    const res: any = await getAiImageBlob(item.id)
-    const url = URL.createObjectURL(extractBlob(res))
-    URL.revokeObjectURL(item.url)
-    item.url = url
-    item.isOriginal = true
-  } catch (e: any) {
-    message.error(e.message || t('common.loadFailed'))
-  } finally {
-    item.loading = false
-  }
-}
-
-/** 关闭来源图片弹窗并释放 objectURL */
-function closeImageView() {
-  for (const item of imageViewItems.value) {
-    URL.revokeObjectURL(item.url)
-  }
-  imageViewItems.value = []
-  showImageViewModal.value = false
-}
-
 /** 打开新增记录弹窗，重置表单 */
 function handleAdd() {
   editingId.value = null
@@ -899,6 +880,17 @@ function handleBatchDelete() {
   })
 }
 
+/** 进入批量选择模式（显示多选列） */
+function enterSelectionMode() {
+  selectionMode.value = true
+}
+
+/** 退出批量选择模式并清空已选 */
+function exitSelectionMode() {
+  selectionMode.value = false
+  checkedTransactionIds.value = []
+}
+
 /** 翻页事件处理 */
 function handlePageChange(p: number) {
   page.value = p
@@ -2062,10 +2054,15 @@ onBeforeUnmount(() => {
         <span style="color: #999; font-size: 13px;">{{ t('transaction.sortLabel') }}</span>
         <NSelect v-model:value="sortValue" :options="sortOptions" style="width: 170px;" />
         <NDivider vertical style="margin: 0 4px;" />
+        <NButton v-if="!selectionMode" @click="enterSelectionMode">{{ t('transaction.batchMode') }}</NButton>
+        <NButton v-else @click="exitSelectionMode">{{ t('transaction.exitBatchMode') }}</NButton>
         <NButton @click="handleBatchOpen">{{ t('transaction.batchSet') }}</NButton>
-        <NButton type="error" :disabled="checkedTransactionIds.length === 0" @click="handleBatchDelete">
+        <NButton v-if="checkedTransactionIds.length > 0" type="error" @click="handleBatchDelete">
           {{ t('transaction.batchDelete') }}
         </NButton>
+        <NButton v-if="checkedTransactionIds.length >= 2" type="primary" ghost @click="handleCreateRelation">
+          {{ t('transaction.relation.createFromSelection') }}
+        </NButton>
         <NButton @click="showImportModal = true">{{ t('transaction.importBill') }}</NButton>
         <NButton @click="goChannelManage">{{ t('channel.manageEntry') }}</NButton>
         <NButton :loading="exporting" @click="handleExport">{{ t('transaction.exportExcel') }}</NButton>
@@ -2342,28 +2339,35 @@ onBeforeUnmount(() => {
     <!-- 账单导入弹窗 -->
     <BillImportModal v-model:show="showImportModal" @imported="fetchData" />
 
+    <!-- 账单详情弹窗（含关系与来源图片） -->
+    <TransactionDetailModal
+      v-model:show="showDetailModal"
+      :transaction="detailTransaction"
+      @changed="fetchData"
+      @edit="handleDetailEdit"
+    />
+
+    <!-- 勾选账单建立关系弹窗 -->
+    <TransactionRelationEditorModal
+      v-model:show="showRelationEditor"
+      :editing-group="null"
+      :initial-members="relationEditorMembers"
+      :anchor-transaction-id="null"
+      @saved="onRelationEditorSaved"
+    />
+
+    <!-- 关系查看弹窗 -->
+    <TransactionRelationModal
+      v-model:show="showRelationModal"
+      :transaction="relationTransaction"
+      @changed="fetchData"
+    />
+
     <!-- 原始账单数据弹窗 -->
     <NModal v-model:show="showRawModal" preset="card" :title="t('transaction.rawDataTitle')" style="width: 640px;">
       <NInput :value="rawDataText" type="textarea" readonly :autosize="{ minRows: 8, maxRows: 20 }" />
     </NModal>
 
-    <!-- 来源图片查看弹窗（图片记账生成的记录）：默认加载缩略图，可切换原图 -->
-    <NModal v-model:show="showImageViewModal" preset="card" :title="t('transaction.sourceImages')" style="width: 720px; max-width: 92vw;" @after-leave="closeImageView">
-      <NSpin :show="imageViewLoading">
-        <NSpace vertical :size="12" style="min-height: 60px;">
-          <div v-for="item in imageViewItems" :key="item.id" class="image-view-item">
-            <img :src="item.url" alt="source image" style="width: 100%; max-height: 70vh; object-fit: contain; border-radius: 6px;" />
-            <div class="image-view-actions">
-              <NTag v-if="item.isOriginal" size="small" type="success">{{ t('transaction.originalImage') }}</NTag>
-              <NButton v-else size="small" :loading="item.loading" @click="loadOriginalImage(item)">
-                {{ t('transaction.loadOriginal') }}
-              </NButton>
-            </div>
-          </div>
-        </NSpace>
-      </NSpin>
-    </NModal>
-
     <!-- 一键设置弹窗（作用于当前表格展示的记录） -->
     <NModal v-model:show="showBatchModal" preset="card" :title="t('transaction.batchTitle')" style="width: 480px;">
       <NForm>
@@ -2602,15 +2606,6 @@ onBeforeUnmount(() => {
   text-decoration: line-through;
 }
 /* 图片识别进度：浅色卡片 + 步骤列表 */
-.image-view-item {
-  display: flex;
-  flex-direction: column;
-  gap: 6px;
-}
-.image-view-actions {
-  display: flex;
-  justify-content: flex-end;
-}
 .ai-progress {
   background: #f7f9fc;
   border: 1px solid #eef1f6;
diff --git a/src/main/java/cn/rosercode/finance/controller/AiController.java b/src/main/java/cn/rosercode/finance/controller/AiController.java
index 1fb1833..593e89e 100644
--- a/src/main/java/cn/rosercode/finance/controller/AiController.java
+++ b/src/main/java/cn/rosercode/finance/controller/AiController.java
@@ -28,6 +28,7 @@ import cn.rosercode.finance.dto.AiConfigRequest;
 import cn.rosercode.finance.dto.AiDecorateRequest;
 import cn.rosercode.finance.dto.AiQueryRequest;
 import cn.rosercode.finance.dto.AiRecordRequest;
+import cn.rosercode.finance.dto.AiRelationRequest;
 import cn.rosercode.finance.dto.AiRuleApplyRequest;
 import cn.rosercode.finance.dto.AiRuleSuggestRequest;
 import cn.rosercode.finance.dto.AiSuggestOneRequest;
@@ -44,6 +45,7 @@ import cn.rosercode.finance.service.AiImageRecordStreamService;
 import cn.rosercode.finance.service.AiImageStorage;
 import cn.rosercode.finance.service.AiQueryService;
 import cn.rosercode.finance.service.AiRecordService;
+import cn.rosercode.finance.service.AiRelationService;
 import cn.rosercode.finance.service.AiRuleService;
 import cn.rosercode.finance.service.AiStatisticsService;
 import cn.rosercode.finance.service.AiSuggestionService;
@@ -57,6 +59,7 @@ import cn.rosercode.finance.vo.AiConfigVO;
 import cn.rosercode.finance.vo.AiQueryResultVO;
 import cn.rosercode.finance.vo.AiRecordImageResultVO;
 import cn.rosercode.finance.vo.AiRecordResultVO;
+import cn.rosercode.finance.vo.AiRelationResultVO;
 import cn.rosercode.finance.vo.AiRuleSuggestResultVO;
 import cn.rosercode.finance.vo.AiStatisticsResultVO;
 import cn.rosercode.finance.vo.AiSuggestionVO;
@@ -91,6 +94,7 @@ public class AiController {
     private final AiStatisticsService aiStatisticsService;
     private final AiImageRecordService aiImageRecordService;
     private final AiImageRecordStreamService aiImageRecordStreamService;
+    private final AiRelationService aiRelationService;
     private final AiImageMapper aiImageMapper;
     private final AiImageStorage aiImageStorage;
 
@@ -102,6 +106,7 @@ public class AiController {
                         AiRuleService aiRuleService, AiStatisticsService aiStatisticsService,
                         AiImageRecordService aiImageRecordService,
                         AiImageRecordStreamService aiImageRecordStreamService,
+                        AiRelationService aiRelationService,
                         AiImageMapper aiImageMapper, AiImageStorage aiImageStorage) {
         this.aiConfigService = aiConfigService;
         this.aiSuggestionService = aiSuggestionService;
@@ -116,6 +121,7 @@ public class AiController {
         this.aiStatisticsService = aiStatisticsService;
         this.aiImageRecordService = aiImageRecordService;
         this.aiImageRecordStreamService = aiImageRecordStreamService;
+        this.aiRelationService = aiRelationService;
         this.aiImageMapper = aiImageMapper;
         this.aiImageStorage = aiImageStorage;
     }
@@ -360,6 +366,19 @@ public class AiController {
         return Result.success(aiChannelService.parse(userId, channelRequest.getText()));
     }
 
+    /**
+     * 根据关系类型与成员账单特征生成关系名称与备注
+     *
+     * @param relationRequest 生成请求，携带关系类型与成员账单特征
+     * @return 关系名称与备注建议
+     */
+    @PostMapping("/relation")
+    @Operation(summary = "AI 生成账单关系", description = "根据关系类型与成员账单特征生成关系名称与备注")
+    public Result<AiRelationResultVO> generateRelation(@RequestBody @Valid AiRelationRequest relationRequest) {
+        Long userId = UserContext.getUserId();
+        return Result.success(aiRelationService.parse(userId, relationRequest));
+    }
+
     /**
      * 根据分类名称推荐 Emoji 图标
      *
diff --git a/src/main/java/cn/rosercode/finance/controller/TransactionGroupController.java b/src/main/java/cn/rosercode/finance/controller/TransactionGroupController.java
new file mode 100644
index 0000000..839acfc
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/controller/TransactionGroupController.java
@@ -0,0 +1,108 @@
+package cn.rosercode.finance.controller;
+
+import java.util.List;
+
+import io.swagger.v3.oas.annotations.Operation;
+import io.swagger.v3.oas.annotations.Parameter;
+import io.swagger.v3.oas.annotations.tags.Tag;
+import jakarta.validation.Valid;
+import org.springframework.web.bind.annotation.DeleteMapping;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.PostMapping;
+import org.springframework.web.bind.annotation.PutMapping;
+import org.springframework.web.bind.annotation.RequestBody;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import cn.rosercode.finance.common.Result;
+import cn.rosercode.finance.dto.TransactionGroupRequest;
+import cn.rosercode.finance.service.TransactionGroupService;
+import cn.rosercode.finance.util.UserContext;
+import cn.rosercode.finance.vo.TransactionGroupVO;
+
+/**
+ * 账单关系组控制器
+ *
+ * <p>提供账单之间父子/同级关系的查询、创建、更新与删除接口</p>
+ *
+ * @date 2026-09-21 20:32:41
+ */
+@RestController
+@RequestMapping("/api/transaction/group")
+@Tag(name = "账单关系管理", description = "账单之间父子/同级关系的查询与维护接口")
+public class TransactionGroupController {
+
+    private final TransactionGroupService transactionGroupService;
+
+    public TransactionGroupController(TransactionGroupService transactionGroupService) {
+        this.transactionGroupService = transactionGroupService;
+    }
+
+    /**
+     * 查询某笔账单所属的全部关系组
+     *
+     * @param transactionId 交易记录ID
+     * @return 关系组列表
+     */
+    @GetMapping("/by-transaction/{transactionId}")
+    @Operation(summary = "查询账单关系", description = "返回指定账单所属的父子/同级关系组及成员账单")
+    public Result<List<TransactionGroupVO>> listByTransaction(
+            @Parameter(description = "交易记录ID") @PathVariable Long transactionId) {
+        return Result.success(transactionGroupService.listByTransaction(UserContext.getUserId(), transactionId));
+    }
+
+    /**
+     * 查询当前用户使用过的关系名称历史
+     *
+     * @param type 关系类型过滤，可选
+     * @return 关系名称列表
+     */
+    @GetMapping("/names")
+    @Operation(summary = "查询关系名称历史", description = "返回当前用户使用过的账单关系名称，按最近使用排序，可按关系类型过滤")
+    public Result<List<String>> names(
+            @Parameter(description = "关系类型过滤，可选") @RequestParam(value = "type", required = false) String type) {
+        return Result.success(transactionGroupService.listNames(UserContext.getUserId(), type));
+    }
+
+    /**
+     * 创建关系组
+     *
+     * @param request 关系组请求参数
+     * @return 新建关系组ID
+     */
+    @PostMapping
+    @Operation(summary = "创建账单关系", description = "将多笔账单按父子或同级关系聚合为一个关系组")
+    public Result<Long> create(@RequestBody @Valid TransactionGroupRequest request) {
+        return Result.success(transactionGroupService.create(UserContext.getUserId(), request));
+    }
+
+    /**
+     * 更新关系组
+     *
+     * @param id      关系组ID
+     * @param request 关系组请求参数
+     * @return 操作结果
+     */
+    @PutMapping("/{id}")
+    @Operation(summary = "更新账单关系", description = "更新关系组的名称、备注、成员与角色")
+    public Result<Void> update(@Parameter(description = "关系组ID") @PathVariable Long id,
+                               @RequestBody @Valid TransactionGroupRequest request) {
+        transactionGroupService.update(UserContext.getUserId(), id, request);
+        return Result.success();
+    }
+
+    /**
+     * 删除关系组
+     *
+     * @param id 关系组ID
+     * @return 操作结果
+     */
+    @DeleteMapping("/{id}")
+    @Operation(summary = "删除账单关系", description = "删除关系组，仅解除账单关联，不删除账单")
+    public Result<Void> delete(@Parameter(description = "关系组ID") @PathVariable Long id) {
+        transactionGroupService.delete(UserContext.getUserId(), id);
+        return Result.success();
+    }
+}
diff --git a/src/main/java/cn/rosercode/finance/converter/VoConverter.java b/src/main/java/cn/rosercode/finance/converter/VoConverter.java
index b910981..1b36bf5 100644
--- a/src/main/java/cn/rosercode/finance/converter/VoConverter.java
+++ b/src/main/java/cn/rosercode/finance/converter/VoConverter.java
@@ -18,6 +18,8 @@ import cn.rosercode.finance.entity.NotificationLog;
 import cn.rosercode.finance.entity.Rule;
 import cn.rosercode.finance.entity.Tag;
 import cn.rosercode.finance.entity.Transaction;
+import cn.rosercode.finance.entity.TransactionGroup;
+import cn.rosercode.finance.entity.TransactionGroupItem;
 import cn.rosercode.finance.entity.User;
 import cn.rosercode.finance.vo.AiUsageVO;
 import cn.rosercode.finance.vo.CategoryVO;
@@ -30,6 +32,8 @@ import cn.rosercode.finance.vo.NotificationChannelVO;
 import cn.rosercode.finance.vo.NotificationLogVO;
 import cn.rosercode.finance.vo.RuleVO;
 import cn.rosercode.finance.vo.TagVO;
+import cn.rosercode.finance.vo.TransactionGroupItemVO;
+import cn.rosercode.finance.vo.TransactionGroupVO;
 import cn.rosercode.finance.vo.TransactionVO;
 import cn.rosercode.finance.vo.UserVO;
 
@@ -129,6 +133,27 @@ public interface VoConverter {
     @Mapping(target = "tags", ignore = true)
     TransactionVO toTransactionVO(Transaction transaction, Category category);
 
+    /**
+     * 账单关系组实体转视图对象。
+     *
+     * <p>成员列表由调用方另行填充。</p>
+     *
+     * @param group 关系组实体
+     * @return 关系组视图对象
+     */
+    @Mapping(target = "items", ignore = true)
+    TransactionGroupVO toTransactionGroupVO(TransactionGroup group);
+
+    /**
+     * 账单关系组成员实体转视图对象。
+     *
+     * <p>仅映射成员角色与排序，关联账单的展示快照由调用方另行填充。</p>
+     *
+     * @param item 关系组成员实体
+     * @return 关系组成员视图对象
+     */
+    TransactionGroupItemVO toTransactionGroupItemVO(TransactionGroupItem item);
+
     /**
      * 通知渠道实体转视图对象。
      *
diff --git a/src/main/java/cn/rosercode/finance/dto/AiRelationMemberRequest.java b/src/main/java/cn/rosercode/finance/dto/AiRelationMemberRequest.java
new file mode 100644
index 0000000..22e5907
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/dto/AiRelationMemberRequest.java
@@ -0,0 +1,26 @@
+package cn.rosercode.finance.dto;
+
+import lombok.Data;
+
+/**
+ * AI 生成账单关系请求的成员账单特征 DTO。
+ *
+ * <p>仅承载收支类型、交易渠道、分类名称与备注，禁止携带金额、交易号、原始数据等敏感字段。</p>
+ *
+ * @date 2026-09-21 21:08:21
+ */
+@Data
+public class AiRelationMemberRequest {
+
+    /** 收支类型：INCOME-收入，EXPENSE-支出 */
+    private String type;
+
+    /** 交易渠道 */
+    private String channel;
+
+    /** 分类名称 */
+    private String categoryName;
+
+    /** 备注 */
+    private String remark;
+}
diff --git a/src/main/java/cn/rosercode/finance/dto/AiRelationRequest.java b/src/main/java/cn/rosercode/finance/dto/AiRelationRequest.java
new file mode 100644
index 0000000..b200497
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/dto/AiRelationRequest.java
@@ -0,0 +1,26 @@
+package cn.rosercode.finance.dto;
+
+import java.util.List;
+
+import jakarta.validation.Valid;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotEmpty;
+import lombok.Data;
+
+/**
+ * AI 生成账单关系名称与备注请求 DTO，携带关系类型与成员账单特征。
+ *
+ * @date 2026-09-21 21:08:21
+ */
+@Data
+public class AiRelationRequest {
+
+    /** 关系类型：PARENT_CHILD-父子，SIBLING-同级 */
+    @NotBlank(message = "关系类型不能为空")
+    private String type;
+
+    /** 成员账单特征列表，至少两条 */
+    @NotEmpty(message = "请先选择关联账单")
+    @Valid
+    private List<AiRelationMemberRequest> members;
+}
diff --git a/src/main/java/cn/rosercode/finance/dto/TransactionGroupItemRequest.java b/src/main/java/cn/rosercode/finance/dto/TransactionGroupItemRequest.java
new file mode 100644
index 0000000..06c2a4f
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/dto/TransactionGroupItemRequest.java
@@ -0,0 +1,23 @@
+package cn.rosercode.finance.dto;
+
+import jakarta.validation.constraints.NotNull;
+import lombok.Data;
+
+/**
+ * 账单关系组成员请求DTO，用于指定关系组中的一笔账单及其角色。
+ *
+ * @date 2026-09-21 20:32:41
+ */
+@Data
+public class TransactionGroupItemRequest {
+
+    /** 交易记录ID，不能为空 */
+    @NotNull(message = "关联账单不能为空")
+    private Long transactionId;
+
+    /** 组内角色：PARENT-父，CHILD-子，MEMBER-成员 */
+    private String role;
+
+    /** 排序序号，用于同级链路顺序 */
+    private Integer sortOrder;
+}
diff --git a/src/main/java/cn/rosercode/finance/dto/TransactionGroupRequest.java b/src/main/java/cn/rosercode/finance/dto/TransactionGroupRequest.java
new file mode 100644
index 0000000..44df13e
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/dto/TransactionGroupRequest.java
@@ -0,0 +1,35 @@
+package cn.rosercode.finance.dto;
+
+import java.util.List;
+
+import jakarta.validation.Valid;
+import jakarta.validation.constraints.NotBlank;
+import jakarta.validation.constraints.NotEmpty;
+import jakarta.validation.constraints.Size;
+import lombok.Data;
+
+/**
+ * 账单关系组请求DTO，用于创建或更新一个关系组及其成员。
+ *
+ * @date 2026-09-21 20:32:41
+ */
+@Data
+public class TransactionGroupRequest {
+
+    /** 关系类型：PARENT_CHILD-父子，SIBLING-同级 */
+    @NotBlank(message = "关系类型不能为空")
+    private String type;
+
+    /** 关系组名称，可选 */
+    @Size(max = 100, message = "关系组名称不能超过100个字符")
+    private String name;
+
+    /** 备注，可选 */
+    @Size(max = 255, message = "备注不能超过255个字符")
+    private String remark;
+
+    /** 关系组成员列表，至少两条 */
+    @NotEmpty(message = "关系组至少包含两条账单")
+    @Valid
+    private List<TransactionGroupItemRequest> items;
+}
diff --git a/src/main/java/cn/rosercode/finance/entity/TransactionGroup.java b/src/main/java/cn/rosercode/finance/entity/TransactionGroup.java
new file mode 100644
index 0000000..4a9573b
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/entity/TransactionGroup.java
@@ -0,0 +1,40 @@
+package cn.rosercode.finance.entity;
+
+import java.time.LocalDateTime;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.Data;
+
+/**
+ * 账单关系组实体类，对应数据库表 t_transaction_group，将多笔账单按父子或同级关系聚合。
+ *
+ * @date 2026-09-21 20:32:41
+ */
+@Data
+@TableName("t_transaction_group")
+public class TransactionGroup {
+
+    /** 关系组ID，主键自增 */
+    @TableId(type = IdType.AUTO)
+    private Long id;
+
+    /** 创建时间 */
+    private LocalDateTime createdAt;
+
+    /** 更新时间 */
+    private LocalDateTime updatedAt;
+
+    /** 所属用户ID */
+    private Long userId;
+
+    /** 关系类型：PARENT_CHILD-父子，SIBLING-同级 */
+    private String type;
+
+    /** 关系组名称 */
+    private String name;
+
+    /** 备注 */
+    private String remark;
+}
diff --git a/src/main/java/cn/rosercode/finance/entity/TransactionGroupItem.java b/src/main/java/cn/rosercode/finance/entity/TransactionGroupItem.java
new file mode 100644
index 0000000..ed4c20a
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/entity/TransactionGroupItem.java
@@ -0,0 +1,37 @@
+package cn.rosercode.finance.entity;
+
+import java.time.LocalDateTime;
+
+import com.baomidou.mybatisplus.annotation.IdType;
+import com.baomidou.mybatisplus.annotation.TableId;
+import com.baomidou.mybatisplus.annotation.TableName;
+import lombok.Data;
+
+/**
+ * 账单关系组成员实体类，对应数据库表 t_transaction_group_item，维护关系组与账单的关联及组内角色。
+ *
+ * @date 2026-09-21 20:32:41
+ */
+@Data
+@TableName("t_transaction_group_item")
+public class TransactionGroupItem {
+
+    /** 关联ID，主键自增 */
+    @TableId(type = IdType.AUTO)
+    private Long id;
+
+    /** 创建时间 */
+    private LocalDateTime createdAt;
+
+    /** 关系组ID */
+    private Long groupId;
+
+    /** 交易记录ID */
+    private Long transactionId;
+
+    /** 组内角色：PARENT-父，CHILD-子，MEMBER-成员 */
+    private String role;
+
+    /** 排序序号，用于同级链路顺序与展示顺序 */
+    private Integer sortOrder;
+}
diff --git a/src/main/java/cn/rosercode/finance/enums/AiCallType.java b/src/main/java/cn/rosercode/finance/enums/AiCallType.java
index 6cc918a..43acbe4 100644
--- a/src/main/java/cn/rosercode/finance/enums/AiCallType.java
+++ b/src/main/java/cn/rosercode/finance/enums/AiCallType.java
@@ -38,5 +38,8 @@ public enum AiCallType {
     RULE,
 
     /** 自然语言统计查询解析 */
-    STATISTICS
+    STATISTICS,
+
+    /** 生成账单关系名称与备注 */
+    RELATION
 }
diff --git a/src/main/java/cn/rosercode/finance/enums/TransactionGroupRole.java b/src/main/java/cn/rosercode/finance/enums/TransactionGroupRole.java
new file mode 100644
index 0000000..8216728
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/enums/TransactionGroupRole.java
@@ -0,0 +1,57 @@
+package cn.rosercode.finance.enums;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * 账单关系组内角色枚举，统一维护成员在关系组中的角色编码与中文名称。
+ *
+ * @date 2026-09-21 20:32:41
+ */
+public enum TransactionGroupRole {
+
+    /** 父账单：父子关系中作为资金池的一方（如充值） */
+    PARENT("父账单"),
+
+    /** 子账单：父子关系中从资金池消费的一方 */
+    CHILD("子账单"),
+
+    /** 成员：同级关系中地位平等的账单 */
+    MEMBER("成员");
+
+    /** 角色中文名称 */
+    private final String label;
+
+    TransactionGroupRole(String label) {
+        this.label = label;
+    }
+
+    /**
+     * 获取角色中文名称。
+     *
+     * @return 中文名称
+     */
+    public String getLabel() {
+        return label;
+    }
+
+    /**
+     * 获取全部合法角色编码列表，顺序与枚举声明一致。
+     *
+     * @return 角色编码列表
+     */
+    public static List<String> codes() {
+        return Arrays.stream(values()).map(Enum::name).collect(Collectors.toList());
+    }
+
+    /**
+     * 判断是否为合法角色编码。
+     *
+     * @param code 角色编码
+     * @return 合法返回 true
+     */
+    public static boolean isValid(String code) {
+        return code != null && Arrays.stream(values()).anyMatch(role -> role.name().equals(code));
+    }
+}
diff --git a/src/main/java/cn/rosercode/finance/enums/TransactionRelationType.java b/src/main/java/cn/rosercode/finance/enums/TransactionRelationType.java
new file mode 100644
index 0000000..0bffabc
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/enums/TransactionRelationType.java
@@ -0,0 +1,72 @@
+package cn.rosercode.finance.enums;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+/**
+ * 账单关系类型枚举，统一维护关系组的类型编码与中文名称。
+ *
+ * @date 2026-09-21 20:32:41
+ */
+public enum TransactionRelationType {
+
+    /** 父子关系：一个父账单（如充值）对应多个子账单（如消费） */
+    PARENT_CHILD("父子关系"),
+
+    /** 同级关系：多笔账单地位平等（如支付链路上的多条记录） */
+    SIBLING("同级关系");
+
+    /** 类型中文名称 */
+    private final String label;
+
+    TransactionRelationType(String label) {
+        this.label = label;
+    }
+
+    /**
+     * 获取类型中文名称。
+     *
+     * @return 中文名称
+     */
+    public String getLabel() {
+        return label;
+    }
+
+    /**
+     * 获取全部合法类型编码列表，顺序与枚举声明一致。
+     *
+     * @return 类型编码列表
+     */
+    public static List<String> codes() {
+        return Arrays.stream(values()).map(Enum::name).collect(Collectors.toList());
+    }
+
+    /**
+     * 判断是否为合法类型编码。
+     *
+     * @param code 类型编码
+     * @return 合法返回 true
+     */
+    public static boolean isValid(String code) {
+        return code != null && Arrays.stream(values()).anyMatch(type -> type.name().equals(code));
+    }
+
+    /**
+     * 将类型编码转换为中文名称，未知编码原样返回。
+     *
+     * @param code 类型编码
+     * @return 中文名称
+     */
+    public static String labelOf(String code) {
+        if (code == null) {
+            return "";
+        }
+        for (TransactionRelationType type : values()) {
+            if (type.name().equals(code)) {
+                return type.label;
+            }
+        }
+        return code;
+    }
+}
diff --git a/src/main/java/cn/rosercode/finance/mapper/TransactionGroupItemMapper.java b/src/main/java/cn/rosercode/finance/mapper/TransactionGroupItemMapper.java
new file mode 100644
index 0000000..36fb892
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/mapper/TransactionGroupItemMapper.java
@@ -0,0 +1,15 @@
+package cn.rosercode.finance.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import org.apache.ibatis.annotations.Mapper;
+
+import cn.rosercode.finance.entity.TransactionGroupItem;
+
+/**
+ * 账单关系组成员Mapper接口，继承MyBatis-Plus的BaseMapper，提供关系组成员表的基础CRUD操作。
+ *
+ * @date 2026-09-21 20:32:41
+ */
+@Mapper
+public interface TransactionGroupItemMapper extends BaseMapper<TransactionGroupItem> {
+}
diff --git a/src/main/java/cn/rosercode/finance/mapper/TransactionGroupMapper.java b/src/main/java/cn/rosercode/finance/mapper/TransactionGroupMapper.java
new file mode 100644
index 0000000..74eb9ee
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/mapper/TransactionGroupMapper.java
@@ -0,0 +1,15 @@
+package cn.rosercode.finance.mapper;
+
+import com.baomidou.mybatisplus.core.mapper.BaseMapper;
+import org.apache.ibatis.annotations.Mapper;
+
+import cn.rosercode.finance.entity.TransactionGroup;
+
+/**
+ * 账单关系组Mapper接口，继承MyBatis-Plus的BaseMapper，提供关系组的基础CRUD操作。
+ *
+ * @date 2026-09-21 20:32:41
+ */
+@Mapper
+public interface TransactionGroupMapper extends BaseMapper<TransactionGroup> {
+}
diff --git a/src/main/java/cn/rosercode/finance/prompt/PromptTemplateService.java b/src/main/java/cn/rosercode/finance/prompt/PromptTemplateService.java
index b46b809..95ee956 100644
--- a/src/main/java/cn/rosercode/finance/prompt/PromptTemplateService.java
+++ b/src/main/java/cn/rosercode/finance/prompt/PromptTemplateService.java
@@ -152,6 +152,15 @@ public class PromptTemplateService {
         return render("ai-channel-system", null);
     }
 
+    /**
+     * 渲染生成账单关系名称与备注的系统提示词（模板 {@code ai-relation-system}）。
+     *
+     * @return 系统提示词
+     */
+    public String relationSystemPrompt() {
+        return render("ai-relation-system", null);
+    }
+
     /**
      * 渲染 Emoji 图标建议的系统提示词（模板 {@code ai-decoration-emoji-system}）。
      *
diff --git a/src/main/java/cn/rosercode/finance/service/AiRelationService.java b/src/main/java/cn/rosercode/finance/service/AiRelationService.java
new file mode 100644
index 0000000..2b86da1
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/service/AiRelationService.java
@@ -0,0 +1,21 @@
+package cn.rosercode.finance.service;
+
+import cn.rosercode.finance.dto.AiRelationRequest;
+import cn.rosercode.finance.vo.AiRelationResultVO;
+
+/**
+ * AI 生成账单关系服务接口，根据关系类型与成员账单特征生成关系名称与备注。
+ *
+ * @date 2026-09-21 21:08:21
+ */
+public interface AiRelationService {
+
+    /**
+     * 根据关系类型与成员账单特征生成关系名称与备注。
+     *
+     * @param userId  用户ID
+     * @param request 关系类型与成员账单特征
+     * @return 关系名称与备注建议
+     */
+    AiRelationResultVO parse(Long userId, AiRelationRequest request);
+}
diff --git a/src/main/java/cn/rosercode/finance/service/TransactionGroupService.java b/src/main/java/cn/rosercode/finance/service/TransactionGroupService.java
new file mode 100644
index 0000000..ecd774f
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/service/TransactionGroupService.java
@@ -0,0 +1,66 @@
+package cn.rosercode.finance.service;
+
+import java.util.List;
+
+import cn.rosercode.finance.dto.TransactionGroupRequest;
+import cn.rosercode.finance.vo.TransactionGroupVO;
+
+/**
+ * 账单关系组服务接口，提供关系组的查询、创建、更新、删除与删除账单时的级联清理。
+ *
+ * @date 2026-09-21 20:32:41
+ */
+public interface TransactionGroupService {
+
+    /**
+     * 查询某笔账单所属的全部关系组。
+     *
+     * @param userId        用户ID
+     * @param transactionId 交易记录ID
+     * @return 关系组列表（含成员账单快照）
+     */
+    List<TransactionGroupVO> listByTransaction(Long userId, Long transactionId);
+
+    /**
+     * 查询当前用户使用过的关系名称历史。
+     *
+     * @param userId 用户ID
+     * @param type   关系类型过滤，为空时返回全部类型
+     * @return 关系名称列表（按最近使用排序，去重）
+     */
+    List<String> listNames(Long userId, String type);
+
+    /**
+     * 创建关系组。
+     *
+     * @param userId  用户ID
+     * @param request 关系组请求参数
+     * @return 新建关系组ID
+     */
+    Long create(Long userId, TransactionGroupRequest request);
+
+    /**
+     * 更新关系组（名称、备注、成员与角色全量替换）。
+     *
+     * @param userId  用户ID
+     * @param id      关系组ID
+     * @param request 关系组请求参数
+     */
+    void update(Long userId, Long id, TransactionGroupRequest request);
+
+    /**
+     * 删除关系组（仅解除账单关联，不删除账单）。
+     *
+     * @param userId 用户ID
+     * @param id     关系组ID
+     */
+    void delete(Long userId, Long id);
+
+    /**
+     * 删除账单后清理其关系关联：移除成员，组内不足或父子组失去父账单时删除整个关系组。
+     *
+     * @param userId         用户ID
+     * @param transactionIds 被删除的交易记录ID列表
+     */
+    void removeTransactionFromGroups(Long userId, List<Long> transactionIds);
+}
diff --git a/src/main/java/cn/rosercode/finance/service/impl/AiRelationServiceImpl.java b/src/main/java/cn/rosercode/finance/service/impl/AiRelationServiceImpl.java
new file mode 100644
index 0000000..7283cf7
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/service/impl/AiRelationServiceImpl.java
@@ -0,0 +1,211 @@
+package cn.rosercode.finance.service.impl;
+
+import com.fasterxml.jackson.core.JsonProcessingException;
+import com.fasterxml.jackson.databind.JsonNode;
+import com.fasterxml.jackson.databind.ObjectMapper;
+import org.springframework.stereotype.Service;
+
+import cn.rosercode.finance.client.DeepSeekClient;
+import cn.rosercode.finance.client.DeepSeekResponse;
+import cn.rosercode.finance.common.BusinessException;
+import cn.rosercode.finance.dto.AiRelationMemberRequest;
+import cn.rosercode.finance.dto.AiRelationRequest;
+import cn.rosercode.finance.entity.AiConfig;
+import cn.rosercode.finance.enums.AiCallType;
+import cn.rosercode.finance.enums.TransactionRelationType;
+import cn.rosercode.finance.enums.TransactionType;
+import cn.rosercode.finance.prompt.PromptTemplateService;
+import cn.rosercode.finance.service.AiConfigService;
+import cn.rosercode.finance.service.AiRelationService;
+import cn.rosercode.finance.service.AiUsageService;
+import cn.rosercode.finance.vo.AiRelationResultVO;
+
+/**
+ * AI 生成账单关系服务实现类，根据关系类型与成员账单特征生成关系名称与备注。
+ *
+ * <p>用户提示词在服务端集中构造，仅包含收支类型、交易渠道、分类名称与截断后的备注，
+ * 不发送金额、交易号、原始数据等敏感字段。</p>
+ *
+ * @date 2026-09-21 21:08:21
+ */
+@Service
+public class AiRelationServiceImpl implements AiRelationService {
+
+    /** 关系名称最大长度 */
+    private static final int NAME_MAX_LENGTH = 50;
+
+    /** 关系备注最大长度 */
+    private static final int REMARK_MAX_LENGTH = 200;
+
+    /** 单次最多发送的成员账单数量 */
+    private static final int MEMBER_LIMIT = 20;
+
+    /** 单条备注截断长度 */
+    private static final int REMARK_TRUNCATE = 30;
+
+    private final AiConfigService aiConfigService;
+    private final DeepSeekClient deepSeekClient;
+    private final AiUsageService aiUsageService;
+    private final ObjectMapper objectMapper;
+    private final PromptTemplateService promptTemplateService;
+
+    public AiRelationServiceImpl(AiConfigService aiConfigService,
+                                 DeepSeekClient deepSeekClient,
+                                 AiUsageService aiUsageService,
+                                 ObjectMapper objectMapper,
+                                 PromptTemplateService promptTemplateService) {
+        this.aiConfigService = aiConfigService;
+        this.deepSeekClient = deepSeekClient;
+        this.aiUsageService = aiUsageService;
+        this.objectMapper = objectMapper;
+        this.promptTemplateService = promptTemplateService;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public AiRelationResultVO parse(Long userId, AiRelationRequest request) {
+        if (request == null || request.getMembers() == null || request.getMembers().isEmpty()) {
+            throw new BusinessException("请先选择关联账单");
+        }
+        AiConfig config = requireConfig(userId);
+        String userPrompt = buildUserPrompt(request);
+
+        long start = System.currentTimeMillis();
+        DeepSeekResponse aiResponse;
+        try {
+            aiResponse = deepSeekClient.chat(config.getBaseUrl(), config.getApiKey(), config.getModel(),
+                    promptTemplateService.relationSystemPrompt(), userPrompt);
+        } catch (RuntimeException e) {
+            // 失败也记录一次使用，便于排查问题
+            aiUsageService.recordFailure(userId, AiCallType.RELATION, config.getModel(),
+                    request.getMembers().size(), System.currentTimeMillis() - start, e.getMessage());
+            throw e;
+        }
+        aiUsageService.recordSuccess(userId, AiCallType.RELATION, config.getModel(),
+                request.getMembers().size(), aiResponse, System.currentTimeMillis() - start);
+
+        return parseResult(aiResponse.getContent());
+    }
+
+    /**
+     * 构造用户提示词，仅包含白名单字段。
+     *
+     * @param request 请求参数
+     * @return 用户提示词
+     */
+    private String buildUserPrompt(AiRelationRequest request) {
+        StringBuilder builder = new StringBuilder();
+        builder.append("关系类型：").append(TransactionRelationType.labelOf(request.getType())).append('\n');
+        builder.append("成员账单：").append('\n');
+        int index = 1;
+        for (AiRelationMemberRequest member : request.getMembers()) {
+            if (member == null) {
+                continue;
+            }
+            if (index > MEMBER_LIMIT) {
+                break;
+            }
+            builder.append(index).append(". ")
+                    .append(TransactionType.labelOf(member.getType())).append(" | ")
+                    .append(trim(member.getChannel())).append(" | ")
+                    .append(trim(member.getCategoryName())).append(" | ")
+                    .append(truncate(member.getRemark(), REMARK_TRUNCATE))
+                    .append('\n');
+            index++;
+        }
+        return builder.toString();
+    }
+
+    /**
+     * 解析模型返回的 JSON 并校验字段合法性。
+     *
+     * @param content 模型输出内容
+     * @return 关系名称与备注建议
+     */
+    private AiRelationResultVO parseResult(String content) {
+        JsonNode root;
+        try {
+            root = objectMapper.readTree(stripCodeFence(content));
+        } catch (JsonProcessingException e) {
+            throw new BusinessException("AI 返回内容不是有效 JSON，请重试");
+        }
+
+        String name = truncate(root.path("name").asText(""), NAME_MAX_LENGTH);
+        if (name.isEmpty()) {
+            throw new BusinessException("AI 未返回有效的关系名称，请重试");
+        }
+
+        AiRelationResultVO vo = new AiRelationResultVO();
+        vo.setName(name);
+        vo.setRemark(truncate(root.path("remark").asText(""), REMARK_MAX_LENGTH));
+        vo.setReason(root.path("reason").asText(""));
+        return vo;
+    }
+
+    /**
+     * 获取并校验当前用户的 AI 配置。
+     *
+     * @param userId 用户ID
+     * @return 有效的 AI 配置
+     */
+    private AiConfig requireConfig(Long userId) {
+        AiConfig config = aiConfigService.getRawConfig(userId);
+        if (config == null || !Boolean.TRUE.equals(config.getEnabled())) {
+            throw new BusinessException("AI 功能未启用，请先在 AI 设置中开启");
+        }
+        if (config.getApiKey() == null || config.getApiKey().isBlank()) {
+            throw new BusinessException("请先配置 DeepSeek API Key");
+        }
+        return config;
+    }
+
+    /**
+     * 去除模型可能附加的 Markdown 代码块围栏。
+     *
+     * @param content 原始内容
+     * @return 清理后的内容
+     */
+    private String stripCodeFence(String content) {
+        if (content == null) {
+            return "";
+        }
+        String cleaned = content.trim();
+        if (cleaned.startsWith("```")) {
+            int firstLineEnd = cleaned.indexOf('\n');
+            if (firstLineEnd > 0) {
+                cleaned = cleaned.substring(firstLineEnd + 1);
+            }
+            if (cleaned.endsWith("```")) {
+                cleaned = cleaned.substring(0, cleaned.length() - 3);
+            }
+        }
+        return cleaned.trim();
+    }
+
+    /**
+     * 去除首尾空白。
+     *
+     * @param value 原值
+     * @return 处理后的值，null 转为空字符串
+     */
+    private String trim(String value) {
+        return value == null ? "" : value.trim();
+    }
+
+    /**
+     * 截断字符串到指定长度。
+     *
+     * @param value 原值
+     * @param max   最大长度
+     * @return 截断后的值
+     */
+    private String truncate(String value, int max) {
+        if (value == null) {
+            return "";
+        }
+        String trimmed = value.trim();
+        return trimmed.length() <= max ? trimmed : trimmed.substring(0, max);
+    }
+}
diff --git a/src/main/java/cn/rosercode/finance/service/impl/TransactionGroupServiceImpl.java b/src/main/java/cn/rosercode/finance/service/impl/TransactionGroupServiceImpl.java
new file mode 100644
index 0000000..312dae3
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/service/impl/TransactionGroupServiceImpl.java
@@ -0,0 +1,452 @@
+package cn.rosercode.finance.service.impl;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.LinkedHashMap;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
+import lombok.extern.slf4j.Slf4j;
+import org.springframework.stereotype.Service;
+import org.springframework.transaction.annotation.Transactional;
+
+import cn.rosercode.finance.common.BusinessException;
+import cn.rosercode.finance.converter.VoConverter;
+import cn.rosercode.finance.dto.TransactionGroupItemRequest;
+import cn.rosercode.finance.dto.TransactionGroupRequest;
+import cn.rosercode.finance.entity.Category;
+import cn.rosercode.finance.entity.Transaction;
+import cn.rosercode.finance.entity.TransactionGroup;
+import cn.rosercode.finance.entity.TransactionGroupItem;
+import cn.rosercode.finance.enums.TransactionGroupRole;
+import cn.rosercode.finance.enums.TransactionRelationType;
+import cn.rosercode.finance.mapper.CategoryMapper;
+import cn.rosercode.finance.mapper.TransactionGroupItemMapper;
+import cn.rosercode.finance.mapper.TransactionGroupMapper;
+import cn.rosercode.finance.mapper.TransactionMapper;
+import cn.rosercode.finance.service.TransactionGroupService;
+import cn.rosercode.finance.vo.TransactionGroupItemVO;
+import cn.rosercode.finance.vo.TransactionGroupVO;
+
+/**
+ * 账单关系组服务实现类，处理关系组的查询、创建、更新、删除与删除账单时的级联清理。
+ *
+ * @date 2026-09-21 20:32:41
+ */
+@Service
+@Slf4j
+public class TransactionGroupServiceImpl implements TransactionGroupService {
+
+    /** 单个关系组成员数量上限 */
+    private static final int MAX_ITEMS = 50;
+
+    /** 关系名称历史返回条数上限 */
+    private static final int NAME_HISTORY_LIMIT = 50;
+
+    private final TransactionGroupMapper transactionGroupMapper;
+    private final TransactionGroupItemMapper transactionGroupItemMapper;
+    private final TransactionMapper transactionMapper;
+    private final CategoryMapper categoryMapper;
+    private final VoConverter voConverter;
+
+    public TransactionGroupServiceImpl(TransactionGroupMapper transactionGroupMapper,
+                                       TransactionGroupItemMapper transactionGroupItemMapper,
+                                       TransactionMapper transactionMapper,
+                                       CategoryMapper categoryMapper,
+                                       VoConverter voConverter) {
+        this.transactionGroupMapper = transactionGroupMapper;
+        this.transactionGroupItemMapper = transactionGroupItemMapper;
+        this.transactionMapper = transactionMapper;
+        this.categoryMapper = categoryMapper;
+        this.voConverter = voConverter;
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public List<TransactionGroupVO> listByTransaction(Long userId, Long transactionId) {
+        // 校验账单归属当前用户
+        Transaction transaction = transactionMapper.selectById(transactionId);
+        if (transaction == null || !transaction.getUserId().equals(userId)) {
+            throw new BusinessException("记录不存在");
+        }
+        List<TransactionGroupItem> memberships = transactionGroupItemMapper.selectList(
+                new LambdaQueryWrapper<TransactionGroupItem>()
+                        .eq(TransactionGroupItem::getTransactionId, transactionId));
+        if (memberships.isEmpty()) {
+            return List.of();
+        }
+        Set<Long> groupIds = memberships.stream()
+                .map(TransactionGroupItem::getGroupId)
+                .collect(Collectors.toCollection(LinkedHashSet::new));
+        List<TransactionGroup> groups = transactionGroupMapper.selectList(new LambdaQueryWrapper<TransactionGroup>()
+                .eq(TransactionGroup::getUserId, userId)
+                .in(TransactionGroup::getId, groupIds));
+        if (groups.isEmpty()) {
+            return List.of();
+        }
+        return toGroupVOs(groups);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    public List<String> listNames(Long userId, String type) {
+        LambdaQueryWrapper<TransactionGroup> wrapper = new LambdaQueryWrapper<TransactionGroup>()
+                .select(TransactionGroup::getName, TransactionGroup::getUpdatedAt)
+                .eq(TransactionGroup::getUserId, userId)
+                .isNotNull(TransactionGroup::getName)
+                .ne(TransactionGroup::getName, "");
+        // 指定合法类型时仅返回该类型的历史名称
+        if (TransactionRelationType.isValid(type)) {
+            wrapper.eq(TransactionGroup::getType, type);
+        }
+        List<TransactionGroup> groups = transactionGroupMapper.selectList(wrapper);
+        // 按更新时间倒序（最近使用优先），去重后截断
+        return groups.stream()
+                .sorted(Comparator.comparing(TransactionGroup::getUpdatedAt,
+                        Comparator.nullsLast(Comparator.reverseOrder())))
+                .map(group -> group.getName().trim())
+                .filter(name -> !name.isEmpty())
+                .distinct()
+                .limit(NAME_HISTORY_LIMIT)
+                .collect(Collectors.toList());
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    @Transactional
+    public Long create(Long userId, TransactionGroupRequest request) {
+        String type = requireType(request.getType());
+        List<TransactionGroupItemRequest> items = normalizeItems(type, request.getItems());
+        List<Long> transactionIds = transactionIds(items);
+        validateTransactions(userId, transactionIds);
+        validateNotInSameTypeGroup(userId, type, transactionIds, null);
+
+        TransactionGroup group = new TransactionGroup();
+        group.setUserId(userId);
+        group.setType(type);
+        group.setName(request.getName());
+        group.setRemark(request.getRemark());
+        transactionGroupMapper.insert(group);
+
+        insertItems(group.getId(), items);
+        log.info("新增账单关系组: userId={}, groupId={}, type={}, 成员={}",
+                userId, group.getId(), type, items.size());
+        return group.getId();
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    @Transactional
+    public void update(Long userId, Long id, TransactionGroupRequest request) {
+        requireGroup(userId, id);
+        String type = requireType(request.getType());
+        List<TransactionGroupItemRequest> items = normalizeItems(type, request.getItems());
+        List<Long> transactionIds = transactionIds(items);
+        validateTransactions(userId, transactionIds);
+        // 同类型唯一性校验时排除当前组自身
+        validateNotInSameTypeGroup(userId, type, transactionIds, id);
+
+        TransactionGroup group = new TransactionGroup();
+        group.setId(id);
+        group.setType(type);
+        group.setName(request.getName());
+        group.setRemark(request.getRemark());
+        transactionGroupMapper.updateById(group);
+
+        transactionGroupItemMapper.delete(new LambdaQueryWrapper<TransactionGroupItem>()
+                .eq(TransactionGroupItem::getGroupId, id));
+        insertItems(id, items);
+        log.info("更新账单关系组: userId={}, groupId={}, type={}, 成员={}", userId, id, type, items.size());
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    @Transactional
+    public void delete(Long userId, Long id) {
+        requireGroup(userId, id);
+        transactionGroupItemMapper.delete(new LambdaQueryWrapper<TransactionGroupItem>()
+                .eq(TransactionGroupItem::getGroupId, id));
+        transactionGroupMapper.deleteById(id);
+        log.info("删除账单关系组: userId={}, groupId={}", userId, id);
+    }
+
+    /**
+     * {@inheritDoc}
+     */
+    @Override
+    @Transactional
+    public void removeTransactionFromGroups(Long userId, List<Long> transactionIds) {
+        if (transactionIds == null || transactionIds.isEmpty()) {
+            return;
+        }
+        List<TransactionGroupItem> memberships = transactionGroupItemMapper.selectList(
+                new LambdaQueryWrapper<TransactionGroupItem>()
+                        .in(TransactionGroupItem::getTransactionId, transactionIds));
+        if (memberships.isEmpty()) {
+            return;
+        }
+        Set<Long> groupIds = memberships.stream()
+                .map(TransactionGroupItem::getGroupId)
+                .collect(Collectors.toCollection(LinkedHashSet::new));
+        // 仅处理属于当前用户的关系组
+        List<TransactionGroup> groups = transactionGroupMapper.selectList(new LambdaQueryWrapper<TransactionGroup>()
+                .eq(TransactionGroup::getUserId, userId)
+                .in(TransactionGroup::getId, groupIds));
+        if (groups.isEmpty()) {
+            return;
+        }
+        // 移除被删账单在这些组中的成员记录
+        transactionGroupItemMapper.delete(new LambdaQueryWrapper<TransactionGroupItem>()
+                .in(TransactionGroupItem::getGroupId, groupIds)
+                .in(TransactionGroupItem::getTransactionId, transactionIds));
+
+        // 逐个检查组是否仍有效：不足两条，或父子组失去父账单时整组移除
+        for (TransactionGroup group : groups) {
+            List<TransactionGroupItem> remaining = transactionGroupItemMapper.selectList(
+                    new LambdaQueryWrapper<TransactionGroupItem>()
+                            .eq(TransactionGroupItem::getGroupId, group.getId()));
+            boolean valid = remaining.size() >= 2;
+            if (valid && TransactionRelationType.PARENT_CHILD.name().equals(group.getType())) {
+                valid = remaining.stream()
+                        .anyMatch(item -> TransactionGroupRole.PARENT.name().equals(item.getRole()));
+            }
+            if (!valid) {
+                transactionGroupItemMapper.delete(new LambdaQueryWrapper<TransactionGroupItem>()
+                        .eq(TransactionGroupItem::getGroupId, group.getId()));
+                transactionGroupMapper.deleteById(group.getId());
+                log.info("账单删除后关系组失效已移除: userId={}, groupId={}", userId, group.getId());
+            }
+        }
+        log.info("账单删除后清理关系: userId={}, 账单={}, 涉及组={}", userId, transactionIds.size(), groups.size());
+    }
+
+    /**
+     * 校验并返回合法的关系类型编码。
+     *
+     * @param type 关系类型编码
+     * @return 合法的关系类型编码
+     */
+    private String requireType(String type) {
+        if (!TransactionRelationType.isValid(type)) {
+            throw new BusinessException("关系类型不合法");
+        }
+        return type;
+    }
+
+    /**
+     * 校验关系组归属并返回实体。
+     *
+     * @param userId 用户ID
+     * @param id     关系组ID
+     * @return 关系组实体
+     */
+    private TransactionGroup requireGroup(Long userId, Long id) {
+        TransactionGroup group = transactionGroupMapper.selectById(id);
+        if (group == null || !group.getUserId().equals(userId)) {
+            throw new BusinessException("关系组不存在");
+        }
+        return group;
+    }
+
+    /**
+     * 归一化成员列表：去重、校验数量，并按关系类型规范角色与排序。
+     *
+     * @param type  关系类型
+     * @param items 原始成员请求列表
+     * @return 归一化后的成员列表
+     */
+    private List<TransactionGroupItemRequest> normalizeItems(String type, List<TransactionGroupItemRequest> items) {
+        if (items == null || items.isEmpty()) {
+            throw new BusinessException("关系组至少包含两条账单");
+        }
+        // 按交易ID去重并保留输入顺序
+        Map<Long, TransactionGroupItemRequest> unique = new LinkedHashMap<>();
+        for (TransactionGroupItemRequest item : items) {
+            if (item == null || item.getTransactionId() == null) {
+                throw new BusinessException("关联账单不能为空");
+            }
+            unique.putIfAbsent(item.getTransactionId(), item);
+        }
+        if (unique.size() < 2) {
+            throw new BusinessException("关系组至少包含两条账单");
+        }
+        if (unique.size() > MAX_ITEMS) {
+            throw new BusinessException("单个关系组最多包含" + MAX_ITEMS + "条账单");
+        }
+
+        boolean parentChild = TransactionRelationType.PARENT_CHILD.name().equals(type);
+        if (parentChild) {
+            long parentCount = unique.values().stream()
+                    .filter(item -> TransactionGroupRole.PARENT.name().equals(item.getRole()))
+                    .count();
+            if (parentCount != 1) {
+                throw new BusinessException("父子关系必须且只能指定一条父账单");
+            }
+        }
+
+        List<TransactionGroupItemRequest> normalized = new ArrayList<>(unique.size());
+        int index = 0;
+        for (TransactionGroupItemRequest item : unique.values()) {
+            if (parentChild) {
+                item.setRole(TransactionGroupRole.PARENT.name().equals(item.getRole())
+                        ? TransactionGroupRole.PARENT.name() : TransactionGroupRole.CHILD.name());
+            } else {
+                item.setRole(TransactionGroupRole.MEMBER.name());
+            }
+            if (item.getSortOrder() == null) {
+                item.setSortOrder(index);
+            }
+            index++;
+            normalized.add(item);
+        }
+        return normalized;
+    }
+
+    /**
+     * 提取成员请求中的交易记录ID列表。
+     *
+     * @param items 成员请求列表
+     * @return 交易记录ID列表
+     */
+    private List<Long> transactionIds(List<TransactionGroupItemRequest> items) {
+        return items.stream().map(TransactionGroupItemRequest::getTransactionId).collect(Collectors.toList());
+    }
+
+    /**
+     * 校验成员账单均存在且归属当前用户。
+     *
+     * @param userId         用户ID
+     * @param transactionIds 交易记录ID列表
+     */
+    private void validateTransactions(Long userId, List<Long> transactionIds) {
+        List<Transaction> transactions = transactionMapper.selectList(new LambdaQueryWrapper<Transaction>()
+                .select(Transaction::getId)
+                .eq(Transaction::getUserId, userId)
+                .in(Transaction::getId, transactionIds));
+        if (transactions.size() != transactionIds.size()) {
+            throw new BusinessException("存在无效的关联账单");
+        }
+    }
+
+    /**
+     * 校验成员账单未加入同类型的其它关系组。
+     *
+     * @param userId         用户ID
+     * @param type           关系类型
+     * @param transactionIds 交易记录ID列表
+     * @param excludeGroupId 需排除的关系组ID（更新场景为当前组），可为 null
+     */
+    private void validateNotInSameTypeGroup(Long userId, String type, List<Long> transactionIds,
+                                            Long excludeGroupId) {
+        List<TransactionGroup> sameTypeGroups = transactionGroupMapper.selectList(
+                new LambdaQueryWrapper<TransactionGroup>()
+                        .select(TransactionGroup::getId)
+                        .eq(TransactionGroup::getUserId, userId)
+                        .eq(TransactionGroup::getType, type));
+        if (sameTypeGroups.isEmpty()) {
+            return;
+        }
+        List<Long> groupIds = sameTypeGroups.stream().map(TransactionGroup::getId).collect(Collectors.toList());
+        LambdaQueryWrapper<TransactionGroupItem> wrapper = new LambdaQueryWrapper<TransactionGroupItem>()
+                .in(TransactionGroupItem::getGroupId, groupIds)
+                .in(TransactionGroupItem::getTransactionId, transactionIds);
+        if (excludeGroupId != null) {
+            wrapper.ne(TransactionGroupItem::getGroupId, excludeGroupId);
+        }
+        if (!transactionGroupItemMapper.selectList(wrapper).isEmpty()) {
+            throw new BusinessException("存在已加入同类型关系的账单，请先解除原关系");
+        }
+    }
+
+    /**
+     * 批量写入关系组成员。
+     *
+     * @param groupId 关系组ID
+     * @param items   归一化后的成员列表
+     */
+    private void insertItems(Long groupId, List<TransactionGroupItemRequest> items) {
+        for (TransactionGroupItemRequest item : items) {
+            TransactionGroupItem entity = new TransactionGroupItem();
+            entity.setGroupId(groupId);
+            entity.setTransactionId(item.getTransactionId());
+            entity.setRole(item.getRole());
+            entity.setSortOrder(item.getSortOrder() == null ? 0 : item.getSortOrder());
+            transactionGroupItemMapper.insert(entity);
+        }
+    }
+
+    /**
+     * 将关系组实体列表转换为视图对象，并批量填充成员账单快照。
+     *
+     * @param groups 关系组实体列表
+     * @return 关系组视图对象列表
+     */
+    private List<TransactionGroupVO> toGroupVOs(List<TransactionGroup> groups) {
+        List<Long> groupIds = groups.stream().map(TransactionGroup::getId).collect(Collectors.toList());
+        List<TransactionGroupItem> items = transactionGroupItemMapper.selectList(
+                new LambdaQueryWrapper<TransactionGroupItem>()
+                        .in(TransactionGroupItem::getGroupId, groupIds)
+                        .orderByAsc(TransactionGroupItem::getSortOrder)
+                        .orderByAsc(TransactionGroupItem::getId));
+
+        // 批量加载成员账单与分类，避免 N+1 查询
+        List<Long> transactionIds = items.stream()
+                .map(TransactionGroupItem::getTransactionId)
+                .distinct()
+                .collect(Collectors.toList());
+        Map<Long, Transaction> transactionMap = transactionIds.isEmpty() ? Map.of()
+                : transactionMapper.selectBatchIds(transactionIds).stream()
+                        .collect(Collectors.toMap(Transaction::getId, transaction -> transaction));
+        List<Long> categoryIds = transactionMap.values().stream()
+                .map(Transaction::getCategoryId)
+                .filter(Objects::nonNull)
+                .distinct()
+                .collect(Collectors.toList());
+        Map<Long, Category> categoryMap = categoryIds.isEmpty() ? Map.of()
+                : categoryMapper.selectBatchIds(categoryIds).stream()
+                        .collect(Collectors.toMap(Category::getId, category -> category));
+
+        Map<Long, List<TransactionGroupItemVO>> itemsByGroup = new HashMap<>();
+        for (TransactionGroupItem item : items) {
+            TransactionGroupItemVO itemVO = voConverter.toTransactionGroupItemVO(item);
+            Transaction transaction = transactionMap.get(item.getTransactionId());
+            if (transaction != null) {
+                itemVO.setType(transaction.getType());
+                itemVO.setAmount(transaction.getAmount());
+                itemVO.setChannel(transaction.getChannel());
+                itemVO.setRemark(transaction.getRemark());
+                itemVO.setRemarkHidden(Boolean.TRUE.equals(transaction.getRemarkHidden()));
+                itemVO.setTransactionTime(transaction.getTransactionTime());
+                Category category = transaction.getCategoryId() == null
+                        ? null : categoryMap.get(transaction.getCategoryId());
+                itemVO.setCategoryName(category == null ? "" : category.getName());
+                itemVO.setCategoryIcon(category == null ? "" : category.getIcon());
+            }
+            itemsByGroup.computeIfAbsent(item.getGroupId(), key -> new ArrayList<>()).add(itemVO);
+        }
+
+        List<TransactionGroupVO> result = new ArrayList<>(groups.size());
+        for (TransactionGroup group : groups) {
+            TransactionGroupVO vo = voConverter.toTransactionGroupVO(group);
+            vo.setItems(itemsByGroup.getOrDefault(group.getId(), List.of()));
+            result.add(vo);
+        }
+        return result;
+    }
+}
diff --git a/src/main/java/cn/rosercode/finance/service/impl/TransactionServiceImpl.java b/src/main/java/cn/rosercode/finance/service/impl/TransactionServiceImpl.java
index e3dfc04..4f6be7b 100644
--- a/src/main/java/cn/rosercode/finance/service/impl/TransactionServiceImpl.java
+++ b/src/main/java/cn/rosercode/finance/service/impl/TransactionServiceImpl.java
@@ -32,6 +32,7 @@ import cn.rosercode.finance.entity.AiImageTransaction;
 import cn.rosercode.finance.entity.Category;
 import cn.rosercode.finance.entity.Tag;
 import cn.rosercode.finance.entity.Transaction;
+import cn.rosercode.finance.entity.TransactionGroupItem;
 import cn.rosercode.finance.entity.TransactionTag;
 import cn.rosercode.finance.enums.ChannelType;
 import cn.rosercode.finance.enums.TransactionType;
@@ -39,9 +40,11 @@ import cn.rosercode.finance.mapper.AiImageMapper;
 import cn.rosercode.finance.mapper.AiImageTransactionMapper;
 import cn.rosercode.finance.mapper.CategoryMapper;
 import cn.rosercode.finance.mapper.TagMapper;
+import cn.rosercode.finance.mapper.TransactionGroupItemMapper;
 import cn.rosercode.finance.mapper.TransactionMapper;
 import cn.rosercode.finance.mapper.TransactionTagMapper;
 import cn.rosercode.finance.service.ChannelService;
+import cn.rosercode.finance.service.TransactionGroupService;
 import cn.rosercode.finance.service.TransactionService;
 import cn.rosercode.finance.util.TransactionDedupUtils;
 import cn.rosercode.finance.vo.TagVO;
@@ -64,7 +67,9 @@ public class TransactionServiceImpl implements TransactionService {
     private final TransactionTagMapper transactionTagMapper;
     private final AiImageMapper aiImageMapper;
     private final AiImageTransactionMapper aiImageTransactionMapper;
+    private final TransactionGroupItemMapper transactionGroupItemMapper;
     private final ChannelService channelService;
+    private final TransactionGroupService transactionGroupService;
     private final VoConverter voConverter;
 
     public TransactionServiceImpl(TransactionMapper transactionMapper,
@@ -73,7 +78,9 @@ public class TransactionServiceImpl implements TransactionService {
                                   TransactionTagMapper transactionTagMapper,
                                   AiImageMapper aiImageMapper,
                                   AiImageTransactionMapper aiImageTransactionMapper,
+                                  TransactionGroupItemMapper transactionGroupItemMapper,
                                   ChannelService channelService,
+                                  TransactionGroupService transactionGroupService,
                                   VoConverter voConverter) {
         this.transactionMapper = transactionMapper;
         this.categoryMapper = categoryMapper;
@@ -81,7 +88,9 @@ public class TransactionServiceImpl implements TransactionService {
         this.transactionTagMapper = transactionTagMapper;
         this.aiImageMapper = aiImageMapper;
         this.aiImageTransactionMapper = aiImageTransactionMapper;
+        this.transactionGroupItemMapper = transactionGroupItemMapper;
         this.channelService = channelService;
+        this.transactionGroupService = transactionGroupService;
         this.voConverter = voConverter;
     }
 
@@ -194,6 +203,7 @@ public class TransactionServiceImpl implements TransactionService {
         // 批量填充标签与来源图片
         fillTags(voList);
         fillImages(voList);
+        fillRelationGroupCount(voList);
 
         return new PageResult<>(voList, result.getTotal(), result.getCurrent(), result.getSize());
     }
@@ -387,6 +397,7 @@ public class TransactionServiceImpl implements TransactionService {
         // 先清理标签关联，再删除记录
         transactionTagMapper.delete(new LambdaQueryWrapper<TransactionTag>()
                 .eq(TransactionTag::getTransactionId, id));
+        transactionGroupService.removeTransactionFromGroups(userId, List.of(id));
         transactionMapper.deleteById(id);
         log.info("删除交易记录: userId={}, id={}", userId, id);
     }
@@ -416,6 +427,7 @@ public class TransactionServiceImpl implements TransactionService {
         // 先清理标签关联，再批量删除记录
         transactionTagMapper.delete(new LambdaQueryWrapper<TransactionTag>()
                 .in(TransactionTag::getTransactionId, ownedIds));
+        transactionGroupService.removeTransactionFromGroups(userId, ownedIds);
         int deleted = transactionMapper.deleteByIds(ownedIds);
         log.info("批量删除交易记录: userId={}, 请求={}, 实际={}", userId, ids.size(), deleted);
         return deleted;
@@ -680,6 +692,26 @@ public class TransactionServiceImpl implements TransactionService {
         }
     }
 
+    /**
+     * 批量填充交易视图对象所属的关系组数量
+     *
+     * @param voList 交易视图对象列表
+     */
+    private void fillRelationGroupCount(List<TransactionVO> voList) {
+        if (voList.isEmpty()) {
+            return;
+        }
+        List<Long> transactionIds = voList.stream().map(TransactionVO::getId).collect(Collectors.toList());
+        List<TransactionGroupItem> items = transactionGroupItemMapper.selectList(
+                new LambdaQueryWrapper<TransactionGroupItem>()
+                        .in(TransactionGroupItem::getTransactionId, transactionIds));
+        Map<Long, Long> counts = items.stream()
+                .collect(Collectors.groupingBy(TransactionGroupItem::getTransactionId, Collectors.counting()));
+        for (TransactionVO vo : voList) {
+            vo.setRelationGroupCount(counts.getOrDefault(vo.getId(), 0L).intValue());
+        }
+    }
+
     /**
      * 应用排序条件：默认按交易时间降序，支持按交易时间或金额升/降序。
      *
diff --git a/src/main/java/cn/rosercode/finance/vo/AiRelationResultVO.java b/src/main/java/cn/rosercode/finance/vo/AiRelationResultVO.java
new file mode 100644
index 0000000..251f499
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/vo/AiRelationResultVO.java
@@ -0,0 +1,21 @@
+package cn.rosercode.finance.vo;
+
+import lombok.Data;
+
+/**
+ * AI 生成账单关系结果视图对象，字段与关系组表单对应。
+ *
+ * @date 2026-09-21 21:08:21
+ */
+@Data
+public class AiRelationResultVO {
+
+    /** 建议的关系名称 */
+    private String name;
+
+    /** 建议的关系备注 */
+    private String remark;
+
+    /** 生成理由，用于向用户说明 */
+    private String reason;
+}
diff --git a/src/main/java/cn/rosercode/finance/vo/TransactionGroupItemVO.java b/src/main/java/cn/rosercode/finance/vo/TransactionGroupItemVO.java
new file mode 100644
index 0000000..7a96db7
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/vo/TransactionGroupItemVO.java
@@ -0,0 +1,48 @@
+package cn.rosercode.finance.vo;
+
+import java.math.BigDecimal;
+import java.time.LocalDateTime;
+
+import lombok.Data;
+
+/**
+ * 账单关系组成员视图对象，包含成员角色与所关联账单的展示快照。
+ *
+ * @date 2026-09-21 20:32:41
+ */
+@Data
+public class TransactionGroupItemVO {
+
+    /** 交易记录ID */
+    private Long transactionId;
+
+    /** 组内角色：PARENT-父，CHILD-子，MEMBER-成员 */
+    private String role;
+
+    /** 排序序号，用于同级链路顺序与展示顺序 */
+    private Integer sortOrder;
+
+    /** 交易类型（收入/支出） */
+    private String type;
+
+    /** 交易金额 */
+    private BigDecimal amount;
+
+    /** 交易渠道 */
+    private String channel;
+
+    /** 备注 */
+    private String remark;
+
+    /** 备注是否隐藏 */
+    private Boolean remarkHidden;
+
+    /** 交易时间 */
+    private LocalDateTime transactionTime;
+
+    /** 分类名称 */
+    private String categoryName;
+
+    /** 分类图标 */
+    private String categoryIcon;
+}
diff --git a/src/main/java/cn/rosercode/finance/vo/TransactionGroupVO.java b/src/main/java/cn/rosercode/finance/vo/TransactionGroupVO.java
new file mode 100644
index 0000000..4e12a81
--- /dev/null
+++ b/src/main/java/cn/rosercode/finance/vo/TransactionGroupVO.java
@@ -0,0 +1,36 @@
+package cn.rosercode.finance.vo;
+
+import java.time.LocalDateTime;
+import java.util.List;
+
+import lombok.Data;
+
+/**
+ * 账单关系组视图对象，用于向前端返回关系组及其成员账单。
+ *
+ * @date 2026-09-21 20:32:41
+ */
+@Data
+public class TransactionGroupVO {
+
+    /** 关系组ID */
+    private Long id;
+
+    /** 关系类型：PARENT_CHILD-父子，SIBLING-同级 */
+    private String type;
+
+    /** 关系组名称 */
+    private String name;
+
+    /** 备注 */
+    private String remark;
+
+    /** 创建时间 */
+    private LocalDateTime createdAt;
+
+    /** 更新时间 */
+    private LocalDateTime updatedAt;
+
+    /** 关系组成员列表 */
+    private List<TransactionGroupItemVO> items;
+}
diff --git a/src/main/java/cn/rosercode/finance/vo/TransactionVO.java b/src/main/java/cn/rosercode/finance/vo/TransactionVO.java
index 8517284..062cdbe 100644
--- a/src/main/java/cn/rosercode/finance/vo/TransactionVO.java
+++ b/src/main/java/cn/rosercode/finance/vo/TransactionVO.java
@@ -56,4 +56,7 @@ public class TransactionVO {
 
     /** 来源图片ID列表（图片记账生成时存在，手动记账为空） */
     private List<Long> imageIds;
+
+    /** 所属关系组数量（父子/同级关系），无关系时为 0 */
+    private Integer relationGroupCount;
 }
diff --git a/src/main/resources/prompts/ai-relation-system.tpl b/src/main/resources/prompts/ai-relation-system.tpl
new file mode 100644
index 0000000..8c89298
--- /dev/null
+++ b/src/main/resources/prompts/ai-relation-system.tpl
@@ -0,0 +1,6 @@
+你是个人记账应用的账单关系助手。用户会给出一组账单的关系类型与成员账单特征，请为这组关系生成一个简洁的名称和一句备注。要求：
+1. name 为 4-12 个汉字的名称，概括这组账单的关系（如「交通卡充值」「淘宝购物支付链」「借款给朋友」）；
+2. remark 为一句话说明（不超过 40 个汉字），点明成员账单之间的关联含义（如充值后分次扣减、同一笔消费的多来源记录、借出后对方归还）；
+3. 借贷场景：当成员为同一交易对方（可结合备注判断）、发生在不同时间，且「支出合计」与「收入合计」大致相等（方向相反，可含多笔）时，应判定为借贷往来（借出—归还）；若一笔借出对应多笔还款，说明为分次归还；
+4. 不要提及或推算任何金额；
+5. 只输出 JSON，不要输出任何多余内容。输出格式：{"name":"交通卡充值","remark":"充值后分次乘车扣减","reason":"简要中文理由"}
diff --git a/src/main/resources/sql/init.sql b/src/main/resources/sql/init.sql
index e80ab6d..fb11e53 100644
--- a/src/main/resources/sql/init.sql
+++ b/src/main/resources/sql/init.sql
@@ -66,6 +66,30 @@ CREATE TABLE IF NOT EXISTS t_transaction_tag (
     INDEX idx_tag_id (tag_id) COMMENT '标签ID索引'
 );
 
+-- 账单关系组表：将多笔账单按父子或同级关系聚合为一个关系组
+CREATE TABLE IF NOT EXISTS t_transaction_group (
+    id BIGINT AUTO_INCREMENT PRIMARY KEY COMMENT '关系组ID，主键自增',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+    updated_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP COMMENT '更新时间',
+    user_id BIGINT NOT NULL COMMENT '所属用户ID',
+    type VARCHAR(20) NOT NULL COMMENT '关系类型：PARENT_CHILD-父子，SIBLING-同级',
+    name VARCHAR(100) COMMENT '关系组名称',
+    remark VARCHAR(255) COMMENT '备注',
+    INDEX idx_user_id (user_id) COMMENT '用户ID索引'
+);
+
+-- 账单关系组成员表：关系组与账单的关联及组内角色
+CREATE TABLE IF NOT EXISTS t_transaction_group_item (
+    id BIGINT AUTO_INCREMENT PRIMARY KEY COMMENT '关联ID，主键自增',
+    created_at DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+    group_id BIGINT NOT NULL COMMENT '关系组ID',
+    transaction_id BIGINT NOT NULL COMMENT '交易记录ID',
+    role VARCHAR(10) NOT NULL COMMENT '组内角色：PARENT-父，CHILD-子，MEMBER-成员',
+    sort_order INT NOT NULL DEFAULT 0 COMMENT '排序序号，用于同级链路顺序',
+    UNIQUE INDEX uk_group_transaction (group_id, transaction_id) COMMENT '关系组+交易唯一索引',
+    INDEX idx_transaction_id (transaction_id) COMMENT '交易记录ID索引'
+);
+
 -- AI 配置表：存储每个用户的 AI 智能建议相关配置
 CREATE TABLE IF NOT EXISTS t_ai_config (
     id BIGINT AUTO_INCREMENT PRIMARY KEY COMMENT '配置ID，主键自增',
diff --git a/src/main/resources/sql/schema-sqlite.sql b/src/main/resources/sql/schema-sqlite.sql
index ff9e166..160bdef 100644
--- a/src/main/resources/sql/schema-sqlite.sql
+++ b/src/main/resources/sql/schema-sqlite.sql
@@ -70,6 +70,28 @@ CREATE TABLE IF NOT EXISTS t_transaction_tag (
 CREATE UNIQUE INDEX IF NOT EXISTS uk_transaction_tag ON t_transaction_tag (transaction_id, tag_id);;
 CREATE INDEX IF NOT EXISTS idx_transaction_tag_tag_id ON t_transaction_tag (tag_id);;
 
+CREATE TABLE IF NOT EXISTS t_transaction_group (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    created_at DATETIME NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%S', 'now', 'localtime')),
+    updated_at DATETIME NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%S', 'now', 'localtime')),
+    user_id INTEGER NOT NULL,
+    type VARCHAR(20) NOT NULL,
+    name VARCHAR(100),
+    remark VARCHAR(255)
+);;
+CREATE INDEX IF NOT EXISTS idx_transaction_group_user_id ON t_transaction_group (user_id);;
+
+CREATE TABLE IF NOT EXISTS t_transaction_group_item (
+    id INTEGER PRIMARY KEY AUTOINCREMENT,
+    created_at DATETIME NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%S', 'now', 'localtime')),
+    group_id INTEGER NOT NULL,
+    transaction_id INTEGER NOT NULL,
+    role VARCHAR(10) NOT NULL,
+    sort_order INTEGER NOT NULL DEFAULT 0
+);;
+CREATE UNIQUE INDEX IF NOT EXISTS uk_transaction_group_item ON t_transaction_group_item (group_id, transaction_id);;
+CREATE INDEX IF NOT EXISTS idx_transaction_group_item_transaction_id ON t_transaction_group_item (transaction_id);;
+
 CREATE TABLE IF NOT EXISTS t_ai_config (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     created_at DATETIME NOT NULL DEFAULT (strftime('%Y-%m-%dT%H:%M:%S', 'now', 'localtime')),
@@ -143,6 +165,14 @@ BEGIN
     UPDATE t_transaction SET updated_at = strftime('%Y-%m-%dT%H:%M:%S', 'now', 'localtime') WHERE id = OLD.id;
 END;;
 
+CREATE TRIGGER IF NOT EXISTS trg_transaction_group_updated_at
+AFTER UPDATE ON t_transaction_group
+FOR EACH ROW
+WHEN NEW.updated_at = OLD.updated_at
+BEGIN
+    UPDATE t_transaction_group SET updated_at = strftime('%Y-%m-%dT%H:%M:%S', 'now', 'localtime') WHERE id = OLD.id;
+END;;
+
 CREATE TRIGGER IF NOT EXISTS trg_ai_config_updated_at
 AFTER UPDATE ON t_ai_config
 FOR EACH ROW