diff --git a/src/main/java/cn/teammodel/controller/admin/service/impl/TeacherServiceImpl.java b/src/main/java/cn/teammodel/controller/admin/service/impl/TeacherServiceImpl.java
index 826882b..3443214 100644
--- a/src/main/java/cn/teammodel/controller/admin/service/impl/TeacherServiceImpl.java
+++ b/src/main/java/cn/teammodel/controller/admin/service/impl/TeacherServiceImpl.java
@@ -548,7 +548,7 @@ public class TeacherServiceImpl implements TeacherService {
                     }
                 }
                 for (TeacherGradeVo grade : gradeList) {
-                    if(teacher.getId().equals(grade.getId())) {
+                    if(StringUtils.isNotEmpty(teacher.getId()) && teacher.getId().equals(grade.getId())) {
                         if(StringUtils.isNotEmpty(grade.getPeriodId())) {
                             teacher.setPeriodId(grade.getPeriodId());
                         }