diff --git a/ghy-system/src/main/resources/mapper/system/SysAreaMapper.xml b/ghy-system/src/main/resources/mapper/system/SysAreaMapper.xml
index 0a2c7cfb..31fd1882 100644
--- a/ghy-system/src/main/resources/mapper/system/SysAreaMapper.xml
+++ b/ghy-system/src/main/resources/mapper/system/SysAreaMapper.xml
@@ -44,6 +44,9 @@
             <if test="parentCode != null and parentCode != ''">
                 AND parent_code = #{parentCode}
             </if>
+            <if test="parentCode == null">
+                AND parent_code is null
+            </if>
         </where>
     </select>
 
@@ -130,4 +133,4 @@
         )
     </insert>
 
-</mapper>
\ No newline at end of file
+</mapper>