diff --git a/scripts/reviewMeetingEditHelpers.check.ts b/scripts/reviewMeetingEditHelpers.check.ts
new file mode 100644
index 000000000..b08e7c717
--- /dev/null
+++ b/scripts/reviewMeetingEditHelpers.check.ts
@@ -0,0 +1,53 @@
+import assert from 'node:assert/strict'
+import {
+  buildProjectTimeBatchPayload,
+  mapCopiedProjectItems,
+  mapPersistedProjectItems,
+  shouldSyncPersistedProjectTimes
+} from '../src/views/review/meeting/meetingEditHelpers'
+
+const baseProject = {
+  id: 101,
+  seqNo: 1,
+  startTime: '09:00',
+  endTime: '09:15',
+  agendaCategory: '项目申报论证',
+  projectTitle: '项目A',
+  reporter: '张三',
+  reporterUnit: '软件学院',
+  reviewDate: '2026-04-01'
+}
+
+const persistedProjects = mapPersistedProjectItems([baseProject])
+assert.equal(
+  persistedProjects[0].sourceProjectId,
+  undefined,
+  '编辑已有会议时，不应该把现有项目 id 回填到 sourceProjectId'
+)
+
+const copiedProjects = mapCopiedProjectItems([baseProject])
+assert.equal(copiedProjects[0].sourceProjectId, 101, '复制会议时，应该保留源项目 id 用于首次复制资料')
+
+assert.equal(
+  shouldSyncPersistedProjectTimes({
+    isEdit: true,
+    isProjectsModified: false,
+    originalMeetingStart: 1711942800000,
+    currentMeetingStart: 1711944600000,
+    projects: [baseProject]
+  }),
+  true,
+  '编辑已有会议且仅修改会议开始时间时，应该同步已落库项目时间'
+)
+
+assert.deepEqual(buildProjectTimeBatchPayload([baseProject]), {
+  items: [
+    {
+      id: 101,
+      startTime: '09:00',
+      endTime: '09:15'
+    }
+  ]
+})
+
+console.log('reviewMeetingEditHelpers checks passed')
diff --git a/src/views/review/meeting/MeetingEdit.vue b/src/views/review/meeting/MeetingEdit.vue
index a1ac50d35..ba56c8f4a 100644
--- a/src/views/review/meeting/MeetingEdit.vue
+++ b/src/views/review/meeting/MeetingEdit.vue
@@ -192,7 +192,7 @@
 </template>
 
 <script setup lang="ts">
-import { ref, reactive, computed, onMounted } from 'vue'
+import { ref, reactive, computed, onMounted, watch } from 'vue'
 import { useRouter, useRoute } from 'vue-router'
 import { ElMessage, ElMessageBox } from 'element-plus'
 import type { FormRules } from 'element-plus'
@@ -210,7 +210,7 @@ import {
   type ReviewMeetingSaveReqVO,
   type ReviewProjectItemVO
 } from '@/api/review/meeting'
-import { getReviewProjectPage } from '@/api/review/project'
+import { getReviewProjectPage, updateReviewProjectTimeBatch } from '@/api/review/project'
 import { getExpertUserList } from '@/api/system/user/index'
 import download from '@/utils/download'
 import ExpertSelectTable from './components/ExpertSelectTable.vue'
@@ -219,6 +219,13 @@ import {
   buildScheduledProjectItems,
   DEFAULT_REVIEW_MEETING_INTERVAL_MINUTES
 } from './projectSchedule'
+import {
+  buildProjectTimeBatchPayload,
+  mapCopiedProjectItems,
+  mapPersistedProjectItems,
+  shouldSyncPersistedProjectTimes,
+  type MeetingEditProjectItem
+} from './meetingEditHelpers'
 
 defineOptions({ name: 'ReviewMeetingEdit' })
 
@@ -254,6 +261,7 @@ type FormData = ReviewMeetingSaveReqVO & {
   organizationUnit?: string
   meetingTimeRange?: any[]
   materialViewTimeRange?: any[]
+  projects: MeetingEditProjectItem[]
 }
 
 const formData = reactive<FormData>({
@@ -292,26 +300,28 @@ const rules: FormRules = {
 }
 
 const formRef = ref()
+const originalMeetingStart = ref<string | number | undefined>()
 
-const mapProjectItems = (projects: any[]): ReviewProjectItemVO[] =>
-  (projects || []).map((item: any) => ({
-    sourceProjectId: item.sourceProjectId ?? item.id,
-    seqNo: item.seqNo,
-    startTime: item.startTime,
-    endTime: item.endTime,
-    agendaCategory: item.agendaCategory,
-    projectTitle: item.projectTitle,
-    reporter: item.reporter,
-    reporterUnit: item.reporterUnit,
-    reviewDate: item.reviewDate
-  }))
-
-const resetProjectReviewDate = (projects: ReviewProjectItemVO[]): ReviewProjectItemVO[] =>
+const resetProjectReviewDate = (projects: MeetingEditProjectItem[]): MeetingEditProjectItem[] =>
   (projects || []).map((item) => ({
     ...item,
     reviewDate: undefined
   }))
 
+const buildPreviewScheduledProjects = (projects: MeetingEditProjectItem[] = formData.projects): MeetingEditProjectItem[] => {
+  const projectsWithReviewDate = applyDefaultReviewDate(projects, formData.meetingTimeRange) as MeetingEditProjectItem[]
+  return (
+    buildScheduledProjectItems(
+      projectsWithReviewDate,
+      formData.meetingTimeRange?.[0],
+      DEFAULT_REVIEW_MEETING_INTERVAL_MINUTES
+    ) || projectsWithReviewDate
+  )
+}
+
+const stripProjectTransientFields = (projects: MeetingEditProjectItem[]): ReviewProjectItemVO[] =>
+  (projects || []).map(({ id: _id, ...item }) => item)
+
 const loadDetail = async (id: number) => {
   formLoading.value = true
   try {
@@ -320,7 +330,7 @@ const loadDetail = async (id: number) => {
       getReviewProjectPage({ reviewMeetingId: id, pageNo: 1, pageSize: 200 })
     ])
     Object.assign(formData, detail)
-    formData.projects = mapProjectItems(projectData?.list ?? [])
+    formData.projects = mapPersistedProjectItems(projectData?.list ?? [])
     if (detail.startTime && detail.endTime) {
       formData.meetingTimeRange = [
         new Date(detail.startTime.replace(' ', 'T')).getTime(),
@@ -333,6 +343,7 @@ const loadDetail = async (id: number) => {
         new Date(detail.materialViewEndTime.replace(' ', 'T')).getTime()
       ]
     }
+    originalMeetingStart.value = formData.meetingTimeRange?.[0]
   } finally {
     formLoading.value = false
   }
@@ -370,7 +381,7 @@ const loadCopySource = async (id: number) => {
     formData.minutesAttachmentType = undefined
     formData.minutesAttachmentSize = undefined
     formData.expertIds = detail.expertIds || []
-    formData.projects = resetProjectReviewDate(mapProjectItems(projectData?.list ?? []))
+    formData.projects = resetProjectReviewDate(mapCopiedProjectItems(projectData?.list ?? []))
     isProjectsModified.value = false
 
     if (detail.startTime && detail.endTime) {
@@ -389,6 +400,7 @@ const loadCopySource = async (id: number) => {
     } else {
       formData.materialViewTimeRange = undefined
     }
+    originalMeetingStart.value = formData.meetingTimeRange?.[0]
 
     ElMessage.info('已带入会议信息和评审项目；保存草稿后将同步复制项目资料，议程附件与会议纪要不会复制')
   } finally {
@@ -407,6 +419,16 @@ onMounted(async () => {
   }
 })
 
+watch(
+  () => formData.meetingTimeRange?.[0],
+  (newValue, oldValue) => {
+    if (newValue === oldValue || oldValue === undefined || !formData.projects.length) {
+      return
+    }
+    formData.projects = buildPreviewScheduledProjects(formData.projects)
+  }
+)
+
 const handleExcelChange = async (uploadFile: UploadFile) => {
   if (!uploadFile.raw) return
   if (formData.projects && formData.projects.length > 0) {
@@ -416,7 +438,8 @@ const handleExcelChange = async (uploadFile: UploadFile) => {
   try {
     const result = await importProjectsFromExcel(uploadFile.raw)
     const projects = applyDefaultReviewDate(result as ReviewProjectItemVO[], formData.meetingTimeRange)
-    formData.projects = buildScheduledProjectItems(projects, formData.meetingTimeRange?.[0]) || projects
+    formData.projects = (buildScheduledProjectItems(projects, formData.meetingTimeRange?.[0]) ||
+      projects) as MeetingEditProjectItem[]
     isProjectsModified.value = true
     ElMessage.success(`成功解析 ${formData.projects.length} 个评审项目`)
   } catch {
@@ -522,8 +545,8 @@ const formatFileSize = (bytes?: number): string => {
   return `${(bytes / (1024 * 1024)).toFixed(1)} MB`
 }
 
-const buildScheduledProjects = (): ReviewProjectItemVO[] => {
-  const projectsWithReviewDate = applyDefaultReviewDate(formData.projects, formData.meetingTimeRange)
+const buildScheduledProjects = (): MeetingEditProjectItem[] => {
+  const projectsWithReviewDate = applyDefaultReviewDate(formData.projects, formData.meetingTimeRange) as MeetingEditProjectItem[]
   const hasCompleteSchedule = projectsWithReviewDate.every((item) => item.startTime && item.endTime)
   if (hasCompleteSchedule) {
     return projectsWithReviewDate
@@ -620,18 +643,34 @@ const submitForm = async () => {
   formLoading.value = true
   try {
     const projects = buildScheduledProjects()
+    const submitProjects = stripProjectTransientFields(projects)
     const submitData: ReviewMeetingSaveReqVO & { projects?: ReviewProjectItemVO[] } = {
       ...formData,
-      projects
+      projects: submitProjects
     }
     if (isEdit.value && !isProjectsModified.value) {
       delete submitData.projects
     }
     if (isEdit.value) {
       await updateReviewMeeting(submitData)
+      const shouldSyncProjectTimes = shouldSyncPersistedProjectTimes({
+        isEdit: isEdit.value,
+        isProjectsModified: isProjectsModified.value,
+        originalMeetingStart: originalMeetingStart.value,
+        currentMeetingStart: formData.meetingTimeRange?.[0],
+        projects
+      })
+      if (shouldSyncProjectTimes) {
+        const timeBatchPayload = buildProjectTimeBatchPayload(projects)
+        if (timeBatchPayload) {
+          await updateReviewProjectTimeBatch(timeBatchPayload)
+        }
+      }
+      originalMeetingStart.value = formData.meetingTimeRange?.[0]
       ElMessage.success('更新成功')
     } else {
       await createReviewMeeting(submitData)
+      originalMeetingStart.value = formData.meetingTimeRange?.[0]
       ElMessage.success('创建成功，会议已保存为草稿')
     }
     router.push({ name: 'ReviewMeeting' })
diff --git a/src/views/review/meeting/meetingEditHelpers.ts b/src/views/review/meeting/meetingEditHelpers.ts
new file mode 100644
index 000000000..ed54219f2
--- /dev/null
+++ b/src/views/review/meeting/meetingEditHelpers.ts
@@ -0,0 +1,93 @@
+export type MeetingEditProjectItem = {
+  id?: number
+  sourceProjectId?: number
+  seqNo: number
+  startTime?: string
+  endTime?: string
+  agendaCategory: string
+  projectTitle: string
+  reporter: string
+  reporterUnit: string
+  reviewDate?: string
+}
+
+export type MeetingProjectSource = {
+  id?: number
+  seqNo?: number
+  startTime?: string
+  endTime?: string
+  agendaCategory?: string
+  projectTitle?: string
+  reporter?: string
+  reporterUnit?: string
+  reviewDate?: string
+  sourceProjectId?: number
+}
+
+export type ProjectTimeBatchPayload = {
+  items: Array<{
+    id: number
+    startTime: string
+    endTime: string
+  }>
+}
+
+type PersistedProjectScheduleSyncArgs = {
+  isEdit: boolean
+  isProjectsModified: boolean
+  originalMeetingStart?: string | number
+  currentMeetingStart?: string | number
+  projects: MeetingProjectSource[]
+}
+
+const mapProjectItems = (projects: MeetingProjectSource[], copySourceProjectId: boolean): MeetingEditProjectItem[] =>
+  (projects || []).map((item) => ({
+    id: item.id,
+    sourceProjectId: copySourceProjectId ? (item.sourceProjectId ?? item.id) : item.sourceProjectId,
+    seqNo: item.seqNo || 0,
+    startTime: item.startTime,
+    endTime: item.endTime,
+    agendaCategory: item.agendaCategory || '',
+    projectTitle: item.projectTitle || '',
+    reporter: item.reporter || '',
+    reporterUnit: item.reporterUnit || '',
+    reviewDate: item.reviewDate
+  }))
+
+export const mapPersistedProjectItems = (projects: MeetingProjectSource[] = []): MeetingEditProjectItem[] =>
+  mapProjectItems(projects, false)
+
+export const mapCopiedProjectItems = (projects: MeetingProjectSource[] = []): MeetingEditProjectItem[] =>
+  mapProjectItems(projects, true)
+
+const normalizeComparableValue = (value?: string | number) =>
+  value === undefined || value === null || value === '' ? undefined : String(value)
+
+export const shouldSyncPersistedProjectTimes = ({
+  isEdit,
+  isProjectsModified,
+  originalMeetingStart,
+  currentMeetingStart,
+  projects
+}: PersistedProjectScheduleSyncArgs) => {
+  if (!isEdit || isProjectsModified) {
+    return false
+  }
+  if (!projects.some((item) => typeof item.id === 'number')) {
+    return false
+  }
+  return normalizeComparableValue(originalMeetingStart) !== normalizeComparableValue(currentMeetingStart)
+}
+
+export const buildProjectTimeBatchPayload = (
+  projects: MeetingProjectSource[] = []
+): ProjectTimeBatchPayload | undefined => {
+  const items = projects
+    .filter((item) => item.id && item.startTime && item.endTime)
+    .map((item) => ({
+      id: item.id as number,
+      startTime: item.startTime as string,
+      endTime: item.endTime as string
+    }))
+  return items.length > 0 ? { items } : undefined
+}