diff --git a/renren-admin/src/main/resources/mapper/sys/SysUserDao.xml b/renren-admin/src/main/resources/mapper/sys/SysUserDao.xml
index 2a116840..74716fed 100644
--- a/renren-admin/src/main/resources/mapper/sys/SysUserDao.xml
+++ b/renren-admin/src/main/resources/mapper/sys/SysUserDao.xml
@@ -5,7 +5,11 @@
 
     <select id="getList" resultType="io.renren.modules.sys.entity.SysUserEntity">
         select t1.*, (select t2.name from sys_dept t2 where t2.id=t1.dept_id) deptName
-        from sys_user t1, sys_user_post t3 where t1.id = t3.user_id and t1.super_admin = 0
+        from sys_user t1
+        <if test = "postId != null and postId.trim() != '' ">
+            left join sys_user_post t3 on t1.id = t3.user_id
+        </if>
+        where  t1.super_admin = 0
         <if test="username != null and username.trim() != ''">
             and t1.username like #{username}
         </if>