diff --git a/epmet-module/gov-issue/gov-issue-server/src/main/java/com/epmet/service/impl/IssueProjectCategoryDictServiceImpl.java b/epmet-module/gov-issue/gov-issue-server/src/main/java/com/epmet/service/impl/IssueProjectCategoryDictServiceImpl.java
index 46bed8859f..6e61017ed1 100644
--- a/epmet-module/gov-issue/gov-issue-server/src/main/java/com/epmet/service/impl/IssueProjectCategoryDictServiceImpl.java
+++ b/epmet-module/gov-issue/gov-issue-server/src/main/java/com/epmet/service/impl/IssueProjectCategoryDictServiceImpl.java
@@ -509,6 +509,9 @@ public class IssueProjectCategoryDictServiceImpl extends BaseServiceImpl<IssuePr
                 result.concat(l.getCategoryName()).concat(",");
             });
         }
+        if (StringUtils.isEmpty(result)){
+            return result;
+        }
         return result.substring(NumConstant.ZERO,result.length()-NumConstant.ONE);
     }
 }