diff --git a/src/main/resources/mapper/StuUserMapper.xml b/src/main/resources/mapper/StuUserMapper.xml
index 0781668..7d4c9c1 100644
--- a/src/main/resources/mapper/StuUserMapper.xml
+++ b/src/main/resources/mapper/StuUserMapper.xml
@@ -428,6 +428,7 @@
         JOIN stu_class sc ON u.class_id = sc.class_id
         where
         u.role_id = 4
+        and
         u.school_id = #{schoolId}
         <if test="classId != null and classId !=''">
             AND u.class_id = #{classId}