diff --git a/src/main/java/com/dc/dc_project/controller/sys/OrgController.java b/src/main/java/com/dc/dc_project/controller/sys/OrgController.java
index 191a4e8..2068701 100644
--- a/src/main/java/com/dc/dc_project/controller/sys/OrgController.java
+++ b/src/main/java/com/dc/dc_project/controller/sys/OrgController.java
@@ -31,7 +31,7 @@ public class OrgController {
     }
 
     @PostMapping("/tree")
-    public ResponseResult tree(OrgQueryDto queryDto) {
+    public ResponseResult tree(@RequestBody @Validated OrgQueryDto queryDto) {
         Long userId = StpUtil.getLoginIdAsLong();
         return orgService.getTree(queryDto, userId);
     }
diff --git a/src/main/java/com/dc/dc_project/mapper/OrgMapper.java b/src/main/java/com/dc/dc_project/mapper/OrgMapper.java
index 2734b4a..1b1ba4f 100644
--- a/src/main/java/com/dc/dc_project/mapper/OrgMapper.java
+++ b/src/main/java/com/dc/dc_project/mapper/OrgMapper.java
@@ -21,6 +21,8 @@ public interface OrgMapper extends BaseMapper<Org> {
     List<Long> getCListByOrgId(Long pOrgId);
 
     List<OrgVo> getList(@Param("queryDto") OrgQueryDto queryDto);
+
+    List<OrgVo> getListAll();
 }
 
 
diff --git a/src/main/java/com/dc/dc_project/service/impl/OrgServiceImpl.java b/src/main/java/com/dc/dc_project/service/impl/OrgServiceImpl.java
index 73e2f72..9e8a473 100644
--- a/src/main/java/com/dc/dc_project/service/impl/OrgServiceImpl.java
+++ b/src/main/java/com/dc/dc_project/service/impl/OrgServiceImpl.java
@@ -141,12 +141,11 @@ public class OrgServiceImpl extends ServiceImpl<OrgMapper, Org>
 
     @Override
     public ResponseResult getTree(OrgQueryDto queryDto, Long userId) {
-        if( queryDto.getId() == null){
+        if(queryDto.getId() == null){
             return ResponseResult.error("参数缺失");
         }
         OrgQueryDto queryDto1 = new OrgQueryDto();
-        queryDto1.setId(queryDto.getId());
-        List<OrgVo> list = baseMapper.getList(queryDto1);
+        List<OrgVo> list = baseMapper.getListAll();
         for (OrgVo orgVo : list){
             List<StandardCategory> standardCategorys = standardCategoryMapper.selectListByOrgId(orgVo.getId());
             orgVo.setStandardCategorys(standardCategorys);
diff --git a/src/main/java/com/dc/dc_project/utils/TreeUtil.java b/src/main/java/com/dc/dc_project/utils/TreeUtil.java
index 9fc5298..8cbea42 100644
--- a/src/main/java/com/dc/dc_project/utils/TreeUtil.java
+++ b/src/main/java/com/dc/dc_project/utils/TreeUtil.java
@@ -24,9 +24,36 @@ public class TreeUtil {
             return new ArrayList<>();
         }
 
+        // 1.构建 ID -> Node 的映射（为了快速查找和组装）
+        Map<Object, T> nodeMap = list.stream()
+                .collect(Collectors.toMap(TreeNode::getId, node -> node, (a, b) -> a));
+
+        // 2.组装所有的父子关系（一次性组装整棵树）
+        // 这一步之后，map里的所有节点都已经包含了它的children
+        for (T node : list) {
+            T parent = nodeMap.get(node.getParentId());
+            if (parent != null) {
+                List<T> children = parent.getChildren();
+                if (children == null) {
+                    children = new ArrayList<>();
+                    parent.setChildren(children);
+                }
+                children.add(node);
+            }
+        }
+
+        // 3.根据 rootId 判断返回策略
+
+        // 情况 A: 找到了指定的节点（例如 rootId=100，且列表中有ID为100的节点）
+        if (rootId != null && nodeMap.containsKey(rootId)) {
+            T rootNode = nodeMap.get(rootId);
+            return Collections.singletonList(rootNode);
+        }
+
+        // 情况 B: 没找到指定节点（例如 rootId=0 或 null，或者 ID 不在列表中）
+        // 这里退化为原逻辑：返回直属子节点
         return list.stream()
                 .filter(node -> Objects.equals(node.getParentId(), rootId))
-                .peek(node -> node.setChildren(getChildren(node, list)))
                 .collect(Collectors.toList());
     }
 
diff --git a/src/main/resources/mapper/OrgMapper.xml b/src/main/resources/mapper/OrgMapper.xml
index ee9d211..05fdc93 100644
--- a/src/main/resources/mapper/OrgMapper.xml
+++ b/src/main/resources/mapper/OrgMapper.xml
@@ -37,24 +37,44 @@
         left join sys_org_laboratory_standard ol on o.id = ol.org_id
         <where>
             and o.is_deleted = 0
-        <if test="queryDto.id != null">
-            and o.id = #{queryDto.id}
-        </if>
-        <if test="queryDto.name != null">
-            and o.name like concat('%',#{queryDto.name},'%')
-        </if>
-        <if test="queryDto.type != null">
-            and o.type = #{queryDto.type}
-        </if>
-        <if test="queryDto.code != null">
-            and o.code like concat('%',#{queryDto.code},'%')
-        </if>
-        <if test="queryDto.remark != null">
-            and o.remark like concat('%',#{queryDto.remark},'%')
-        </if>
-        <if test="queryDto.standardCategoryId != null">
-            and ol.standard_category_id = #{queryDto.standardCategoryId}
-        </if>
+            <if test="queryDto.id != null">
+                and o.id = #{queryDto.id}
+            </if>
+            <if test="queryDto.name != null">
+                and o.name like concat('%',#{queryDto.name},'%')
+            </if>
+            <if test="queryDto.type != null">
+                and o.type = #{queryDto.type}
+            </if>
+            <if test="queryDto.code != null">
+                and o.code like concat('%',#{queryDto.code},'%')
+            </if>
+            <if test="queryDto.remark != null">
+                and o.remark like concat('%',#{queryDto.remark},'%')
+            </if>
+            <if test="queryDto.standardCategoryId != null">
+                and ol.standard_category_id = #{queryDto.standardCategoryId}
+            </if>
+        </where>
+    </select>
+    <select id="getListAll" resultType="com.dc.dc_project.model.vo.OrgVo">
+        select
+            o.name as name,
+            o.code as code,
+            o.type as type,
+            o.sort_order as sortOrder,
+            o.remark as remark,
+            o.leader_id as leaderId,
+            p.name as leaderName,
+            o.parent_id as parentId,
+            o1.name as parentName,
+            o.id as id
+        from sys_org o
+        left join sys_personnel p on o.leader_id = p.id
+        left join sys_org o1 on o.parent_id = o1.id
+        left join sys_org_laboratory_standard ol on o.id = ol.org_id
+        <where>
+            and o.is_deleted = 0
         </where>
     </select>
 </mapper>