diff --git a/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml b/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml
index 324dbaa..0d3a43b 100644
--- a/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml
+++ b/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml
@@ -75,11 +75,11 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
 	</select>
 	
 	<select id="selectChildrenDeptById" parameterType="Long" resultMap="SysDeptResult">
-		select * from sys_dept where find_in_set(#{deptId}, ancestors)
+		select * from ${prefix}sys_dept where CAST(#{deptId} AS text) = ANY(string_to_array(ancestors, ','))
 	</select>
 	
 	<select id="selectNormalChildrenDeptById" parameterType="Long" resultType="int">
-		select count(*) from sys_dept where status = 0 and del_flag = '0' and find_in_set(#{deptId}, ancestors)
+		select count(*) from ${prefix}sys_dept where status = 0 and del_flag = '0' and CAST(#{deptId} AS text) = ANY(string_to_array(ancestors, ','))
 	</select>
 	
 	<select id="checkDeptNameUnique" resultMap="SysDeptResult">