diff --git a/apps/backend/src/repositories/worker-platform/shared.ts b/apps/backend/src/repositories/worker-platform/shared.ts
index 2e5fcec0..9af1016f 100644
--- a/apps/backend/src/repositories/worker-platform/shared.ts
+++ b/apps/backend/src/repositories/worker-platform/shared.ts
@@ -56,7 +56,8 @@ export function resolveWorkOrderShareCancellationStatus(
   workOrderStatus: string,
   shareStatus: string,
 ): 'open' | null {
-  if (!['open', 'pending_acceptance'].includes(workOrderStatus)) return null
+  // in_progress 用于解围历史问题单处置产生的"份额已提交、母单回到进行中"的卡死存量单
+  if (!['open', 'pending_acceptance', 'in_progress'].includes(workOrderStatus)) return null
   if (!['joined', 'submitted'].includes(shareStatus)) return null
   return 'open'
 }
diff --git a/apps/backend/src/repositories/worker-platform/work-order-issue-repo.ts b/apps/backend/src/repositories/worker-platform/work-order-issue-repo.ts
index 33fd4786..8712ca61 100644
--- a/apps/backend/src/repositories/worker-platform/work-order-issue-repo.ts
+++ b/apps/backend/src/repositories/worker-platform/work-order-issue-repo.ts
@@ -6,6 +6,16 @@ import { getOutstandingDepositAmountWithClient } from './work-order-deposit-repo
 import { RESET_GIFT_FLOW_SQL } from './work-order-gift-repo.js'
 import type { ProblemWorkOrderResolutionAction, WorkOrderRow } from './types.js'
 
+/** 问题单退回打手时，按标记前状态恢复；异常历史数据回退单人单进行中。 */
+export function resolveProblemReturnToWorkerStatus(
+  fromStatus: string,
+): 'open' | 'in_progress' | 'pending_acceptance' {
+  if (['open', 'in_progress', 'pending_acceptance'].includes(fromStatus)) {
+    return fromStatus as 'open' | 'in_progress' | 'pending_acceptance'
+  }
+  return 'in_progress'
+}
+
 export async function resolveProblemWorkOrder(input: {
   workOrderId: number
   action: ProblemWorkOrderResolutionAction
@@ -27,6 +37,26 @@ export async function resolveProblemWorkOrder(input: {
     const workOrder = currentResult.rows[0] || null
     if (!workOrder) return null
 
+    // return_to_worker 需恢复到标记问题单前的真实状态：拼单份额已全部提交时
+    // 标记前是 pending_acceptance，若一律回到 in_progress 会陷入"份额已提交、
+    // 母单却不可验收也不可重新提交"的卡死状态，因此按最近一次 marked_problem
+    // 事件的 from_status 恢复。
+    let restoreStatus = ''
+    if (input.action === 'return_to_worker') {
+      const eventResult = await client.query<{ from_status: string }>(
+        `
+          SELECT from_status
+          FROM work_order_events
+          WHERE work_order_id = $1 AND event_type = 'marked_problem'
+          ORDER BY id DESC
+          LIMIT 1
+        `,
+        [input.workOrderId],
+      )
+      const fromStatus = String(eventResult.rows[0]?.from_status || '').trim()
+      restoreStatus = resolveProblemReturnToWorkerStatus(fromStatus)
+    }
+
     const shouldReleaseDeposit = ['reopen', 'cancel_release'].includes(input.action)
     const shouldDeductDeposit = input.action === 'cancel_deduct'
     const workerId = Number(workOrder.assigned_worker_id || 0)
@@ -83,12 +113,16 @@ export async function resolveProblemWorkOrder(input: {
 
     const targetStatus =
       input.action === 'return_to_worker'
-        ? 'in_progress'
+        ? restoreStatus || 'in_progress'
         : input.action === 'reopen'
           ? 'open'
           : 'cancelled'
     const shouldClearAssignment = input.action === 'reopen'
-    const shouldClearSubmission = ['return_to_worker', 'reopen'].includes(input.action)
+    // 仅在真正退回打手重做（回到进行中）时清验收提交；份额已提交待验收的拼单
+    // 需保留母单待验收状态，否则份额验收链路断裂。
+    const shouldClearSubmission =
+      input.action === 'reopen' ||
+      (input.action === 'return_to_worker' && targetStatus === 'in_progress')
 
     await client.query(
       `
diff --git a/apps/backend/src/repositories/worker-platform/work-order-settlement-repo.ts b/apps/backend/src/repositories/worker-platform/work-order-settlement-repo.ts
index 3f2e6d4a..66cc0ff7 100644
--- a/apps/backend/src/repositories/worker-platform/work-order-settlement-repo.ts
+++ b/apps/backend/src/repositories/worker-platform/work-order-settlement-repo.ts
@@ -392,8 +392,10 @@ export async function acceptWorkOrderShareAndSettle(input: {
   failureReason: 'work_order_not_accepting' | 'share_not_submitted' | null
 }> {
   return withTransaction(async (client) => {
+    // in_progress 仅用于解围历史问题单处置产生的"份额已提交、母单却回到进行中"
+    // 的卡死存量单；正常拼单流程母单只会是 open / pending_acceptance。
     const orderResult = await client.query<WorkOrderRow>(
-      `SELECT * FROM work_orders WHERE id = $1 AND status IN ('open', 'pending_acceptance') FOR UPDATE`,
+      `SELECT * FROM work_orders WHERE id = $1 AND status IN ('open', 'pending_acceptance', 'in_progress') FOR UPDATE`,
       [input.workOrderId],
     )
     const workOrder = orderResult.rows[0] || null
@@ -592,7 +594,7 @@ export async function cancelWorkOrderShare(input: {
       [input.workOrderId],
     )
     const workOrder = orderResult.rows[0] || null
-    if (!workOrder || !['open', 'pending_acceptance'].includes(workOrder.status)) {
+    if (!workOrder || !['open', 'pending_acceptance', 'in_progress'].includes(workOrder.status)) {
       return {
         order: workOrder,
         share: null,
diff --git a/apps/backend/src/repositories/worker-platform/work-order-share-repo.ts b/apps/backend/src/repositories/worker-platform/work-order-share-repo.ts
index 596727d3..2959d675 100644
--- a/apps/backend/src/repositories/worker-platform/work-order-share-repo.ts
+++ b/apps/backend/src/repositories/worker-platform/work-order-share-repo.ts
@@ -295,7 +295,7 @@ export async function submitWorkOrderShareAcceptance(input: {
   now: string
 }): Promise<{
   share: WorkOrderShareRow | null
-  failureReason: 'share_not_found' | 'share_status_invalid' | null
+  failureReason: 'share_not_found' | 'share_status_invalid' | 'work_order_status_invalid' | null
 }> {
   return withTransaction(async (client) => {
     const orderResult = await client.query<{
@@ -309,9 +309,12 @@ export async function submitWorkOrderShareAcceptance(input: {
       [input.workOrderId],
     )
     const workOrder = orderResult.rows[0] || null
-    if (!workOrder || !['open', 'pending_acceptance'].includes(workOrder.status)) {
+    if (!workOrder) {
       return { share: null, failureReason: 'share_not_found' }
     }
+    if (!['open', 'pending_acceptance'].includes(workOrder.status)) {
+      return { share: null, failureReason: 'work_order_status_invalid' }
+    }
 
     const lockResult = await client.query<{ id: number }>(
       `
diff --git a/apps/backend/src/services/worker-platform/worker-acceptance-service.ts b/apps/backend/src/services/worker-platform/worker-acceptance-service.ts
index 1b94df64..4d3c4ea4 100644
--- a/apps/backend/src/services/worker-platform/worker-acceptance-service.ts
+++ b/apps/backend/src/services/worker-platform/worker-acceptance-service.ts
@@ -435,6 +435,12 @@ async function submitWorkerSharingAcceptance(
       errorCode: 'work_order_sharing_share_submitted',
     })
   }
+  if (result.failureReason === 'work_order_status_invalid') {
+    throw createHttpError('当前拼单状态不能提交验收资料，请联系管理员', {
+      statusCode: 409,
+      errorCode: 'work_order_sharing_submit_status_invalid',
+    })
+  }
   if (!result.share) {
     throw createHttpError('未找到拼单份额', {
       statusCode: 404,
diff --git a/apps/backend/src/services/worker-platform/worker-platform-service.test.ts b/apps/backend/src/services/worker-platform/worker-platform-service.test.ts
index f15cf913..402265f4 100644
--- a/apps/backend/src/services/worker-platform/worker-platform-service.test.ts
+++ b/apps/backend/src/services/worker-platform/worker-platform-service.test.ts
@@ -16,6 +16,7 @@ import {
   resolveWorkOrderShareJoinQuantity,
   resolveOpenSharingSyncReward,
 } from '../../repositories/worker-platform/index.js'
+import { resolveProblemReturnToWorkerStatus } from '../../repositories/worker-platform/work-order-issue-repo.js'
 import type { OrderItemRow, OrderRow } from '../../types/repository/rows.js'
 import {
   assertWithdrawChannelAllowedForAmount,
@@ -1045,6 +1046,13 @@ test('拼单份额撤单只允许未验收份额并让母工单回到大厅状
   assert.equal(resolveWorkOrderShareCancellationStatus('open', 'cancelled'), null)
 })
 
+test('问题单退回打手按标记前状态恢复', () => {
+  assert.equal(resolveProblemReturnToWorkerStatus('pending_acceptance'), 'pending_acceptance')
+  assert.equal(resolveProblemReturnToWorkerStatus('open'), 'open')
+  assert.equal(resolveProblemReturnToWorkerStatus('in_progress'), 'in_progress')
+  assert.equal(resolveProblemReturnToWorkerStatus(''), 'in_progress')
+})
+
 test('后台更新资料时普通接单可以修改接单价格', () => {
   assert.equal(
     resolveAdminMaterialRewardAmount({