diff --git a/src/main/java/com/glxp/api/service/basic/impl/UdiRelevanceServiceImpl.java b/src/main/java/com/glxp/api/service/basic/impl/UdiRelevanceServiceImpl.java
index 3ab91fc10..12a0a2bee 100644
--- a/src/main/java/com/glxp/api/service/basic/impl/UdiRelevanceServiceImpl.java
+++ b/src/main/java/com/glxp/api/service/basic/impl/UdiRelevanceServiceImpl.java
@@ -104,10 +104,12 @@ public class UdiRelevanceServiceImpl extends ServiceImpl<UdiRelevanceDao, UdiRel
 
     @Override
     public UdiRelevanceResponse selectByRelId(String relId) {
+        if (StrUtil.isEmpty(relId))
+            return null;
         FilterUdiRelRequest filterUdiRelRequest = new FilterUdiRelRequest();
         filterUdiRelRequest.setId(Long.parseLong(relId));
         UdiRelevanceResponse udiRelevanceResponses = selectOneUdi(filterUdiRelRequest);
-        return null;
+        return udiRelevanceResponses;
     }
 
     @Override