diff --git a/src/main/java/com/coscoshipping/ebtp/project/org/service/impl/SysOrgServiceImpl.java b/src/main/java/com/coscoshipping/ebtp/project/org/service/impl/SysOrgServiceImpl.java
index 4abffa1..8160707 100644
--- a/src/main/java/com/coscoshipping/ebtp/project/org/service/impl/SysOrgServiceImpl.java
+++ b/src/main/java/com/coscoshipping/ebtp/project/org/service/impl/SysOrgServiceImpl.java
@@ -22,9 +22,7 @@ import com.coscoshipping.ebtp.project.org.service.SysOrgService;
 import org.springframework.util.CollectionUtils;
 
 import java.time.LocalDateTime;
-import java.util.ArrayList;
-import java.util.Comparator;
-import java.util.List;
+import java.util.*;
 import java.util.stream.Collectors;
 
 /**
@@ -59,33 +57,77 @@ public class SysOrgServiceImpl extends BaseServiceImpl<SysOrgMapper, SysOrg> imp
             return sysOrgList.stream().map(entity -> BeanUtil.toBean(entity, SysOrgVO.class)).collect(Collectors.toList());
         } else {
             sysOrgList = this.list();
-
-            //存储所有的部门ID
-            String allDepartmentId = "";
-
-            if (!CollectionUtils.isEmpty(sysOrgList)) {
-                //获取要查询的节点ID  如果为空则查询所有节点进行树形展示
-                String rootNode = StringUtils.isNotBlank(org.getOrgId()) ? org.getOrgId() : CommonUtil.ROOT_NODE;
-
-                allDepartmentId += rootNode;
-
-                List<SysOrgVO> sysOrgVOList = JsonUtils.jsonToList(sysOrgList, SysOrgVO.class);
-                //获取要查询的节点
-                sysOrgVO = sysOrgVOList.stream()
-                        .filter(n -> StringUtils.equals(n.getUpOrgId(), rootNode))
-                        .map(this::setInfoForTree)
-                        .collect(Collectors.toList())
-                        .get(0);
-                //递归查询节点信息
-                getChildrenNode(sysOrgVOList, sysOrgVO, allDepartmentId);
-            }
-            sysOrgVO.setAllDepartmentId(allDepartmentId);
             List<SysOrgVO> voList = new ArrayList<>();
-            voList.add(sysOrgVO);
+
+            if (CollectionUtils.isEmpty(sysOrgList)) {
+                return voList;
+            }
+
+            // 预处理所有节点为SysOrgVO，并构建子节点映射表
+            List<SysOrgVO> allOrgVOs = sysOrgList.stream()
+                .map(entity -> BeanUtil.toBean(entity, SysOrgVO.class))
+                .map(this::setInfoForTree) // 提前应用树形结构转换
+                .collect(Collectors.toList());
+
+            // 构建父节点到子节点的映射（key: upOrgId，value: 子节点列表）
+            Map<String, List<SysOrgVO>> parentToChildrenMap = new HashMap<>();
+            String rootOrgCode = "10000000";
+            for (SysOrgVO orgVO : allOrgVOs) {
+                String parentId = StringUtils.isBlank(orgVO.getUpOrgId()) ? rootOrgCode : orgVO.getUpOrgId();
+                parentToChildrenMap.computeIfAbsent(parentId, k -> new ArrayList<>()).add(orgVO);
+            }
+
+            // 获取根节点ID
+            String rootNode = StringUtils.isNotBlank(org.getOrgId()) ? org.getOrgId() : rootOrgCode;
+
+            // 使用StringBuilder记录所有部门ID
+            StringBuilder allDepartmentIdBuilder = new StringBuilder(rootNode);
+
+            // 构建多级树结构（从根节点开始递归）
+            List<SysOrgVO> rootChildren = parentToChildrenMap.getOrDefault(rootNode, new ArrayList<>());
+            for (SysOrgVO rootChild : rootChildren) {
+                buildMultiLevelTree(rootChild, parentToChildrenMap, allDepartmentIdBuilder);
+                voList.add(rootChild);
+            }
+
+            // 设置全量部门ID
+            voList.forEach(vo -> vo.setAllDepartmentId(allDepartmentIdBuilder.toString()));
+
             return voList;
         }
     }
 
+    /**
+     * 递归构建多级组织机构树结构
+     *
+     * @param currentNode            当前需要处理的组织机构节点
+     * @param parentToChildrenMap    父节点ID到子节点列表的映射表（预处理结果，用于O(1)时间查找子节点）
+     * @param allDepartmentIdBuilder 记录所有层级部门ID的字符串构建器（按层级顺序累加）
+     * @apiNote 通过递归方式为当前节点设置子节点，并继续处理子节点的子节点，最终形成完整的多级树结构。
+     *          依赖预处理的{@code parentToChildrenMap}提升查找子节点效率，避免重复遍历全量数据。
+     */
+    private void buildMultiLevelTree(SysOrgVO currentNode,
+                                    Map<String, List<SysOrgVO>> parentToChildrenMap,
+                                    StringBuilder allDepartmentIdBuilder) {
+        // 从映射表直接获取当前节点的子节点（O(1)）
+        List<SysOrgVO> children = parentToChildrenMap.getOrDefault(currentNode.getOrgId(), new ArrayList<>());
+
+        // 排序
+        List<SysOrgVO> sortedChildren = children.stream()
+            .sorted(Comparator.comparing(SysOrgVO::getSort, Comparator.nullsLast(String::compareTo)))
+            .collect(Collectors.toList());
+
+        currentNode.setChildren(sortedChildren);
+
+        // 记录当前节点ID,累加所有层级ID
+        allDepartmentIdBuilder.append(",").append(currentNode.getOrgId());
+
+        // 递归处理子节点
+        for (SysOrgVO child : sortedChildren) {
+            buildMultiLevelTree(child, parentToChildrenMap, allDepartmentIdBuilder);
+        }
+    }
+
     @Override
     public Boolean insertByVo(SysOrgVO vo) {
         vo.setOrgId(PropertyUtils.getSnowflakeId()).setCreateDate(LocalDateTime.now());
@@ -181,38 +223,6 @@ public class SysOrgServiceImpl extends BaseServiceImpl<SysOrgMapper, SysOrg> imp
                 .setValue(orgVO.getOrgId());
     }
 
-    /**
-     * 递归查询部门信息树形展示
-     *
-     * @param sysOrgVOList 所有部门信息
-     * @param sysOrg       当前查询节点
-     */
-    private void getChildrenNode(List<SysOrgVO> sysOrgVOList, SysOrgVO sysOrg, String allDepartmentId) {
-
-        List<SysOrgVO> childrenNodeList = new ArrayList<>();
-
-        for (SysOrgVO sysOrgVO : sysOrgVOList) {
-            //判断机构部门上级ID和当前节点ID是否相等
-            if (StringUtils.equals(sysOrg.getOrgId(), sysOrgVO.getUpOrgId())) {
-                childrenNodeList.add(sysOrgVO);
-                allDepartmentId += sysOrgVO.getOrgId();
-                getChildrenNode(sysOrgVOList, sysOrgVO, allDepartmentId);
-            }
-        }
-        //判断是否有下级节点
-        if (!CollectionUtils.isEmpty(childrenNodeList)) {
-            //根据sort排序
-            childrenNodeList = childrenNodeList
-                    .stream()
-                    .map(this::setInfoForTree)
-                    .sorted(Comparator.comparing(SysOrgVO::getSort, Comparator.nullsLast(String::compareTo)))
-                    .collect(Collectors.toList());
-            sysOrg.setChildren(childrenNodeList);
-        } else {
-            sysOrg.setChildren(ListUtil.empty());
-        }
-    }
-
     private LambdaQueryWrapper<SysOrg> buildQueryWrapper(SysOrgVO vo) {
         LambdaQueryWrapper<SysOrg> lqw = Wrappers.lambdaQuery();
         lqw.like(StringUtils.isNotBlank(vo.getOrgName()), SysOrg::getOrgName, vo.getOrgName());