diff --git a/src/main/java/cn/teammodel/controller/admin/service/impl/AdminAppraiseServiceImpl.java b/src/main/java/cn/teammodel/controller/admin/service/impl/AdminAppraiseServiceImpl.java
index 04a2c01..57f3d89 100644
--- a/src/main/java/cn/teammodel/controller/admin/service/impl/AdminAppraiseServiceImpl.java
+++ b/src/main/java/cn/teammodel/controller/admin/service/impl/AdminAppraiseServiceImpl.java
@@ -142,7 +142,7 @@ public class AdminAppraiseServiceImpl implements AdminAppraiseService {
         Long endTime = timeRangeDto.getEndTime();
         String academicYearId = timeRangeDto.getAcademicYearId();
         String schoolId = SecurityUtil.getLoginUser().getSchoolId();
-        String typeName = "";
+        String typeName = null;
         if (timeRangeDto.getType().equals("moral")) {
             typeName = "德育";
         }else if (timeRangeDto.getType().equals("labour")){