diff --git a/ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/system/SysDeptController.java b/ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/system/SysDeptController.java
index 96a2ea6..e47bdf6 100644
--- a/ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/system/SysDeptController.java
+++ b/ruoyi-admin/src/main/java/com/ruoyi/web/controller/system/system/SysDeptController.java
@@ -1,16 +1,15 @@
 package com.ruoyi.web.controller.system.system;
 
 import java.util.List;
+import java.util.Objects;
+
+import io.swagger.annotations.ApiOperation;
 import org.apache.shiro.authz.annotation.RequiresPermissions;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.stereotype.Controller;
 import org.springframework.ui.ModelMap;
 import org.springframework.validation.annotation.Validated;
-import org.springframework.web.bind.annotation.GetMapping;
-import org.springframework.web.bind.annotation.PathVariable;
-import org.springframework.web.bind.annotation.PostMapping;
-import org.springframework.web.bind.annotation.RequestMapping;
-import org.springframework.web.bind.annotation.ResponseBody;
+import org.springframework.web.bind.annotation.*;
 import com.ruoyi.common.annotation.Log;
 import com.ruoyi.common.constant.UserConstants;
 import com.ruoyi.common.core.controller.BaseController;
@@ -184,4 +183,12 @@ public class SysDeptController extends BaseController
         List<Ztree> ztrees = deptService.selectDeptTreeExcludeChild(dept);
         return ztrees;
     }
+
+
+    @ApiOperation("查询下级")
+    @GetMapping("/detpList")
+    @ResponseBody
+    public AjaxResult getDeptBydeptId(@RequestParam(required = false)  Long deptId) {
+        return success(deptService.getDeptBydeptId(Objects.nonNull(deptId) ? deptId : 0));
+    }
 }
diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/mapper/SysDeptMapper.java b/ruoyi-system/src/main/java/com/ruoyi/system/mapper/SysDeptMapper.java
index af2b705..2d8e6a3 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/mapper/SysDeptMapper.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/mapper/SysDeptMapper.java
@@ -114,4 +114,13 @@ public interface SysDeptMapper
      * @return 子部门数
      */
     public int selectNormalChildrenDeptById(Long deptId);
+
+
+    /**
+     * 根据ID查询所有子部门
+     *
+     * @param deptId 部门ID
+     * @return 部门列表
+     */
+    public List<SysDept> getDeptBydeptId(Long deptId);
 }
diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/service/ISysDeptService.java b/ruoyi-system/src/main/java/com/ruoyi/system/service/ISysDeptService.java
index 10ce107..1f2e187 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/service/ISysDeptService.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/service/ISysDeptService.java
@@ -114,4 +114,15 @@ public interface ISysDeptService
      * @param deptId 部门id
      */
     public void checkDeptDataScope(Long deptId);
+
+
+    /**
+     *
+     *  通过父id查询
+     * @param deptId
+     * @return java.util.List<com.ruoyi.common.core.domain.entity.SysDept>
+     */
+
+
+    public List<SysDept> getDeptBydeptId(Long deptId);
 }
diff --git a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysDeptServiceImpl.java b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysDeptServiceImpl.java
index 710161f..34b9b96 100644
--- a/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysDeptServiceImpl.java
+++ b/ruoyi-system/src/main/java/com/ruoyi/system/service/impl/SysDeptServiceImpl.java
@@ -325,4 +325,9 @@ public class SysDeptServiceImpl implements ISysDeptService
             }
         }
     }
+
+    @Override
+    public List<SysDept> getDeptBydeptId(Long deptId) {
+        return deptMapper.getDeptBydeptId(deptId);
+    }
 }
diff --git a/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml b/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml
index 818be86..1e2ab48 100644
--- a/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml
+++ b/ruoyi-system/src/main/resources/mapper/system/SysDeptMapper.xml
@@ -169,4 +169,8 @@ PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
         </foreach>
 	</update>
 
+	<select id="getDeptBydeptId" parameterType="Long" resultMap="SysDeptResult">
+		select * from ${prefix}sys_dept where parent_id = #{deptId} and del_flag = '0'
+	</select>
+
 </mapper> 
\ No newline at end of file