diff --git a/mhd_wms/src/main/java/com/mhd/wms/application/service/investigationManage/InvestigationManageApplicationService.java b/mhd_wms/src/main/java/com/mhd/wms/application/service/investigationManage/InvestigationManageApplicationService.java
index 728655db5..034e168e1 100644
--- a/mhd_wms/src/main/java/com/mhd/wms/application/service/investigationManage/InvestigationManageApplicationService.java
+++ b/mhd_wms/src/main/java/com/mhd/wms/application/service/investigationManage/InvestigationManageApplicationService.java
@@ -167,7 +167,11 @@ public class InvestigationManageApplicationService {
         }
         
         List<InvestigetionManageDetailPO> detailList = investigationManagePO.getInvestigetionManageDetailList();
-        
+
+        // 物料编码相同的明细排在一起展示（稳定排序，同编码内保持原顺序；仅排序不聚合，各条明细独立）
+        detailList.sort(Comparator.comparing(InvestigetionManageDetailPO::getMaterialCode,
+                Comparator.nullsLast(Comparator.naturalOrder())));
+
         // 性能优化：批量获取批次属性，避免N+1查询问题
         // 1. 收集所有唯一的materialBaseInfoId
         Set<Long> materialBaseInfoIdSet = detailList.stream()