diff --git a/lib/__tests__/ding-workflow-sync.test.ts b/lib/__tests__/ding-workflow-sync.test.ts
index 5e5620bd..962d6e22 100644
--- a/lib/__tests__/ding-workflow-sync.test.ts
+++ b/lib/__tests__/ding-workflow-sync.test.ts
@@ -4,6 +4,7 @@ import {
   isAllowedDingWorkflowProcessCode,
   isDingWorkflowOngoing,
   normalizeDingWorkflowBrand,
+  normalizeDingWorkflowDepartment,
   normalizeDingWorkflowProcessCode,
   sourceWorkflowTimestampToIso,
 } from '@/lib/ding-workflow-sync'
@@ -64,4 +65,12 @@ describe('ding workflow snapshot sync semantics', () => {
     expect(normalizeDingWorkflowBrand('新品牌')).toBe('其他品牌')
     expect(normalizeDingWorkflowBrand(null)).toBe('其他品牌')
   })
+
+  it('normalizes DingTalk department fields before grouping requester dimensions', () => {
+    expect(normalizeDingWorkflowDepartment('["运营中心E"]')).toBe('运营中心E')
+    expect(normalizeDingWorkflowDepartment('[{"name":"品牌中心"}]')).toBe('品牌中心')
+    expect(normalizeDingWorkflowDepartment(['运营中心E', '运营中心E'])).toBe('运营中心E')
+    expect(normalizeDingWorkflowDepartment('综合支持部')).toBe('综合支持部')
+    expect(normalizeDingWorkflowDepartment(null)).toBeNull()
+  })
 })
diff --git a/lib/ding-workflow-sync.ts b/lib/ding-workflow-sync.ts
index 1e45012a..cfae4c3b 100644
--- a/lib/ding-workflow-sync.ts
+++ b/lib/ding-workflow-sync.ts
@@ -213,6 +213,34 @@ export function normalizeDingWorkflowBrand(value: unknown): string {
   return DING_WORKFLOW_BRANDS.find((brand) => normalized.includes(brand)) || '其他品牌'
 }
 
+function collectDingWorkflowDepartmentNames(value: unknown): string[] {
+  if (value === null || value === undefined) return []
+  if (Array.isArray(value)) {
+    return value.flatMap(collectDingWorkflowDepartmentNames)
+  }
+  if (typeof value === 'object') {
+    const record = value as Record<string, unknown>
+    return ['name', 'label', 'value', 'text', 'title']
+      .flatMap((key) => collectDingWorkflowDepartmentNames(record[key]))
+  }
+
+  const normalized = clean(value)
+  if (!normalized) return []
+  if (normalized.startsWith('[') || normalized.startsWith('{')) {
+    try {
+      return collectDingWorkflowDepartmentNames(JSON.parse(normalized))
+    } catch {
+      // Keep non-JSON department names unchanged.
+    }
+  }
+  return [normalized]
+}
+
+export function normalizeDingWorkflowDepartment(value: unknown): string | null {
+  const names = Array.from(new Set(collectDingWorkflowDepartmentNames(value)))
+  return names.length > 0 ? names.join(' / ') : null
+}
+
 function parseJson(value: unknown): unknown {
   const normalized = clean(value)
   if (!normalized) return null
@@ -631,8 +659,8 @@ function buildSnapshotPayload(
     const schemeFields = schemeRowsByWorkflow.get(processInstanceId) || []
     const assignments = extractContactAssignments(schemeFields)
     const brand = normalizeDingWorkflowBrand(firstSchemeValue(schemeFields, ['品牌']))
-    const requesterDepartment = firstSchemeValue(schemeFields, ['需求部门'])
-      || clean(row.originatorDeptName)
+    const requesterDepartment = normalizeDingWorkflowDepartment(firstSchemeValue(schemeFields, ['需求部门']))
+      || normalizeDingWorkflowDepartment(row.originatorDeptName)
       || '未记录部门'
     const originatorUserId = clean(row.originatorUserId)
     const requesterName = firstSchemeValue(schemeFields, ['需求人'])
@@ -957,7 +985,9 @@ function mapSnapshotListItem(row: {
     projectType: row.projectType || getDingWorkflowProjectType(processCode),
     brand: row.brand || '其他品牌',
     requesterName: row.requesterName || '未记录',
-    requesterDepartment: row.requesterDepartment || row.originatorDeptName || '未记录部门',
+    requesterDepartment: normalizeDingWorkflowDepartment(row.requesterDepartment)
+      || normalizeDingWorkflowDepartment(row.originatorDeptName)
+      || '未记录部门',
     activeTasks: normalizeActiveTasks(row.activeTasks),
     originatorUserId: row.originatorUserId,
     originatorDeptName: row.originatorDeptName,