diff --git a/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockOutOrder/service/ReservationStockOutOrderDomainService.java b/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockOutOrder/service/ReservationStockOutOrderDomainService.java
index bde5e11a3..a90e17cdb 100644
--- a/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockOutOrder/service/ReservationStockOutOrderDomainService.java
+++ b/mhd_oms/src/main/java/com/mhd/oms/domain/reservationStockOutOrder/service/ReservationStockOutOrderDomainService.java
@@ -514,6 +514,13 @@ public class ReservationStockOutOrderDomainService {
         for (Long inOrderId : inOrderIds) {
             ReservationStockOutOrder byId = stockOutOrderService.getById(inOrderId);
             String inOrderNumber = byId.getOutOrderNumber();
+            // 幂等拦截：已存在有效执行单时禁止重复下发（重复下发会生成新执行单并原样复制明细uniqueId，撞执行明细表唯一约束）
+            long activeExecutionCount = executionStockOutOrderService.count(new QueryWrapper<ExecutionStockOutOrder>().lambda()
+                    .eq(ExecutionStockOutOrder::getBusinessOutOrderNumber, inOrderNumber)
+                    .eq(ExecutionStockOutOrder::getDelFlag, 1));
+            if (activeExecutionCount > 0) {
+                throw new ServiceException("出库单[" + inOrderNumber + "]已下发，请勿重复下发；如需重新下发请先取消下发");
+            }
             List<String> executionInOrderNumbers = new  ArrayList<>();
             List<ReservationOutMaterialDetail> materialDetailList = outMaterialDetailService.list(new QueryWrapper<ReservationOutMaterialDetail>().lambda().eq(ReservationOutMaterialDetail::getOutOrderNumber, inOrderNumber));