diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/FormalSettlementServiceImpl.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/FormalSettlementServiceImpl.java
index 4e58963f..f3b6ac7e 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/FormalSettlementServiceImpl.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/FormalSettlementServiceImpl.java
@@ -981,7 +981,7 @@ public class FormalSettlementServiceImpl extends BaseServiceImpl<FormalSettlemen
 	@Override
 	@Transactional(rollbackFor = Exception.class)
 	public String doSyncKingdee(Long id) {
-		FormalSettlement settlement = existing(id);
+		FormalSettlement settlement = lockedExisting(id);
 		if (!TransportBusiConstant.APPROVED.equals(settlement.getApprovalStatus())) throw new ServiceException("仅审批通过的正式结算单允许同步金蝶");
 		// 已同步幂等返回（含历史由付款申请同步联动回写的存量已同步数据）；星瀚内码由附件补传分支反查回填
 		if ("synced".equals(settlement.getKingdeeSyncStatus())) return settlement.getKingdeeBillNo();
@@ -2325,6 +2325,14 @@ public class FormalSettlementServiceImpl extends BaseServiceImpl<FormalSettlemen
 		return entity;
 	}
 
+	/** 行锁读：同一单据并发推送串行化（锁随 doSyncKingdee 事务提交释放，后者读到已同步状态幂等返回） */
+	private FormalSettlement lockedExisting(Long id) {
+		FormalSettlement entity = baseMapper.selectOne(Wrappers.<FormalSettlement>lambdaQuery()
+			.eq(FormalSettlement::getId, id).last("FOR UPDATE"));
+		if (entity == null || Objects.equals(entity.getIsDeleted(), 1)) throw new ServiceException("正式结算单不存在");
+		return entity;
+	}
+
 	private FormalSettlement editable(Long id) {
 		FormalSettlement entity = existing(id);
 		if (!TransportBusiConstant.DRAFT.equals(entity.getApprovalStatus()) && !TransportBusiConstant.RETURNED.equals(entity.getApprovalStatus())) throw new ServiceException("仅草稿或已驳回的正式结算单允许编辑");
diff --git a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceApplicationServiceImpl.java b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceApplicationServiceImpl.java
index 10b197a8..ab2d6bad 100644
--- a/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceApplicationServiceImpl.java
+++ b/blade-service/blade-transport/src/main/java/org/springblade/transport/service/impl/InvoiceApplicationServiceImpl.java
@@ -701,7 +701,7 @@ public class InvoiceApplicationServiceImpl extends BaseServiceImpl<InvoiceApplic
 	@Override
 	@Transactional(rollbackFor = Exception.class)
 	public String doSyncKingdee(Long id) {
-		InvoiceApplication entity = existing(id);
+		InvoiceApplication entity = lockedExisting(id);
 		if (!TransportBusiConstant.APPROVED.equals(entity.getApprovalStatus())) throw new ServiceException("仅审批通过的开票申请允许同步金蝶");
 		// 已同步/已开票幂等返回（开票完成为终态）；星瀚内码由附件补传分支经 A303-4 反查回填
 		if (KingdeeBfiConstant.KINGDEE_STATUS_SYNCED.equals(entity.getKingdeeStatus())
@@ -1669,6 +1669,14 @@ public class InvoiceApplicationServiceImpl extends BaseServiceImpl<InvoiceApplic
 		return entity;
 	}
 
+	/** 行锁读：同一单据并发推送串行化（锁随 doSyncKingdee 事务提交释放，后者读到已同步状态幂等返回） */
+	private InvoiceApplication lockedExisting(Long id) {
+		InvoiceApplication entity = baseMapper.selectOne(Wrappers.<InvoiceApplication>lambdaQuery()
+			.eq(InvoiceApplication::getId, id).last("FOR UPDATE"));
+		if (entity == null || Objects.equals(entity.getIsDeleted(), 1)) throw new ServiceException("开票申请不存在");
+		return entity;
+	}
+
 	private InvoiceApplication editable(Long id) {
 		InvoiceApplication entity = existing(id);
 		if (!List.of(TransportBusiConstant.DRAFT, TransportBusiConstant.RETURNED).contains(entity.getApprovalStatus())) throw new ServiceException("当前状态不可编辑");