diff --git a/furniture-3d-system/src/lib/oa-board-flow-selection.test.ts b/furniture-3d-system/src/lib/oa-board-flow-selection.test.ts
new file mode 100644
index 00000000..920985bf
--- /dev/null
+++ b/furniture-3d-system/src/lib/oa-board-flow-selection.test.ts
@@ -0,0 +1,92 @@
+import { selectLatestRestartableChildFlows } from './oa-board-flow-selection'
+
+type TestFlowRecord = {
+  flowType: string
+  processInstanceId: string
+  createdAtSource: Date | null
+  updatedAtSource: Date | null
+  status: string
+}
+
+function buildFlow(
+  flowType: string,
+  processInstanceId: string,
+  createdAtSource: string | null,
+  status: string,
+  updatedAtSource = createdAtSource,
+): TestFlowRecord {
+  return {
+    flowType,
+    processInstanceId,
+    createdAtSource: createdAtSource ? new Date(createdAtSource) : null,
+    updatedAtSource: updatedAtSource ? new Date(updatedAtSource) : null,
+    status,
+  }
+}
+
+describe('OA 看板子流程版本选择', () => {
+  it('首单、美术和限价流程各自只保留最晚发起的一条', () => {
+    const records = [
+      buildFlow('review', 'review-1', '2026-08-03T02:30:00Z', 'COMPLETED'),
+      buildFlow('order', 'order-refused', '2026-08-03T08:00:00Z', 'REFUSED'),
+      buildFlow('order', 'order-running', '2026-08-04T08:00:00Z', 'RUNNING'),
+      buildFlow('art', 'art-refused', '2026-08-05T08:00:00Z', 'REFUSED'),
+      buildFlow('art', 'art-completed', '2026-08-06T08:00:00Z', 'COMPLETED'),
+      buildFlow('pricing', 'pricing-terminated', '2026-08-17T01:49:00Z', 'TERMINATED'),
+      buildFlow('pricing', 'pricing-completed', '2026-08-17T01:51:00Z', 'COMPLETED'),
+      buildFlow('main', 'main-1', '2026-08-17T02:00:00Z', 'RUNNING'),
+    ]
+
+    expect(
+      selectLatestRestartableChildFlows(records).map((record) => record.processInstanceId),
+    ).toEqual([
+      'review-1',
+      'order-running',
+      'art-completed',
+      'pricing-completed',
+      'main-1',
+    ])
+  })
+
+  it('以发起时间为主，不让旧流程的较晚更新时间覆盖新流程', () => {
+    const records = [
+      buildFlow(
+        'art',
+        'old-art-updated-later',
+        '2026-08-05T08:00:00Z',
+        'REFUSED',
+        '2026-08-08T08:00:00Z',
+      ),
+      buildFlow(
+        'art',
+        'new-art',
+        '2026-08-06T08:00:00Z',
+        'RUNNING',
+        '2026-08-06T09:00:00Z',
+      ),
+    ]
+
+    expect(selectLatestRestartableChildFlows(records)).toEqual([records[1]])
+  })
+
+  it('发起时间相同时用更新时间稳定决定最新记录', () => {
+    const records = [
+      buildFlow(
+        'pricing',
+        'pricing-older-update',
+        '2026-08-17T01:51:00Z',
+        'TERMINATED',
+        '2026-08-17T01:52:00Z',
+      ),
+      buildFlow(
+        'pricing',
+        'pricing-newer-update',
+        '2026-08-17T01:51:00Z',
+        'COMPLETED',
+        '2026-08-17T01:58:00Z',
+      ),
+    ]
+
+    expect(selectLatestRestartableChildFlows(records)).toEqual([records[1]])
+  })
+})
diff --git a/furniture-3d-system/src/lib/oa-board-flow-selection.ts b/furniture-3d-system/src/lib/oa-board-flow-selection.ts
new file mode 100644
index 00000000..b5847080
--- /dev/null
+++ b/furniture-3d-system/src/lib/oa-board-flow-selection.ts
@@ -0,0 +1,47 @@
+const RESTARTABLE_CHILD_FLOW_TYPES = new Set(['order', 'art', 'pricing'])
+
+export type OaBoardFlowSelectionRecord = {
+  flowType: string
+  processInstanceId: string
+  createdAtSource: Date | null
+  updatedAtSource: Date | null
+}
+
+function toTimestamp(value: Date | null) {
+  const timestamp = value?.getTime() ?? 0
+  return Number.isFinite(timestamp) ? timestamp : 0
+}
+
+function compareFlowRecency(
+  left: OaBoardFlowSelectionRecord,
+  right: OaBoardFlowSelectionRecord,
+) {
+  const createdAtDiff = toTimestamp(left.createdAtSource) - toTimestamp(right.createdAtSource)
+  if (createdAtDiff !== 0) return createdAtDiff
+
+  const updatedAtDiff = toTimestamp(left.updatedAtSource) - toTimestamp(right.updatedAtSource)
+  if (updatedAtDiff !== 0) return updatedAtDiff
+
+  return left.processInstanceId.localeCompare(right.processInstanceId)
+}
+
+export function selectLatestRestartableChildFlows<T extends OaBoardFlowSelectionRecord>(
+  records: T[],
+) {
+  const latestByFlowType = new Map<string, T>()
+
+  records.forEach((record) => {
+    if (!RESTARTABLE_CHILD_FLOW_TYPES.has(record.flowType)) return
+
+    const currentLatest = latestByFlowType.get(record.flowType)
+    if (!currentLatest || compareFlowRecency(record, currentLatest) > 0) {
+      latestByFlowType.set(record.flowType, record)
+    }
+  })
+
+  return records.filter(
+    (record) =>
+      !RESTARTABLE_CHILD_FLOW_TYPES.has(record.flowType) ||
+      latestByFlowType.get(record.flowType) === record,
+  )
+}
diff --git a/furniture-3d-system/src/server/services/oa-board-sync.service.ts b/furniture-3d-system/src/server/services/oa-board-sync.service.ts
index 056c91bf..ffa4b4ce 100644
--- a/furniture-3d-system/src/server/services/oa-board-sync.service.ts
+++ b/furniture-3d-system/src/server/services/oa-board-sync.service.ts
@@ -6,6 +6,7 @@ import {
 import type sql from 'mssql'
 import { Prisma } from '@prisma/client'
 import { prisma } from '@/lib/prisma'
+import { selectLatestRestartableChildFlows } from '@/lib/oa-board-flow-selection'
 import { externalEmployeeDirectoryService } from './external-employee-directory.service'
 import type { OaBoardProjectGraphInput } from './oa-board.service'
 import {
@@ -3106,7 +3107,10 @@ function buildProjectGroups(records: NormalizedFlowRecord[]): PreparedProjectGro
     })
   }
 
-  return Array.from(groups.values())
+  return Array.from(groups.values()).map((group) => ({
+    ...group,
+    flowRecords: selectLatestRestartableChildFlows(group.flowRecords),
+  }))
 }
 
 function countNestedRecords(projectGraphs: OaBoardProjectGraphInput[]) {