diff --git a/laws-modules/src/main/java/com/jero/modules/bindPart/service/impl/LawsBindPartServiceImpl.java b/laws-modules/src/main/java/com/jero/modules/bindPart/service/impl/LawsBindPartServiceImpl.java
index bd520453..29705229 100644
--- a/laws-modules/src/main/java/com/jero/modules/bindPart/service/impl/LawsBindPartServiceImpl.java
+++ b/laws-modules/src/main/java/com/jero/modules/bindPart/service/impl/LawsBindPartServiceImpl.java
@@ -364,7 +364,7 @@ public class LawsBindPartServiceImpl extends ServiceImpl<LawsBindPartMapper, Law
             // 调用PDM判断零部件编号是否在当前的零部件分类下
             boolean validPartBelong = dockingService.validPartBelong(lawsBindPart.getPartNo(), lawsBindPart.getPartName(), existBind.getPartCategoryNum());
             if (validPartBelong) {
-                return existBind;
+                return null;
             }
             // 零部件编号和零部件分类码绑定关系发生变更，所以需要将系统中存储的所有该零部件号的零部件分类码清空
             existBind.setPartCategoryNum(null);