diff --git a/backend/src/main/java/com/designhub/service/UserService.java b/backend/src/main/java/com/designhub/service/UserService.java
index 25a5e01..c7a728e 100644
--- a/backend/src/main/java/com/designhub/service/UserService.java
+++ b/backend/src/main/java/com/designhub/service/UserService.java
@@ -1317,15 +1317,44 @@ public class UserService {
                 }
             }
             
-            // 2. 通过部门名称模糊匹配
+            // 2. 优先通过部门名称完全相等匹配
             if (matched == null && dingDeptName != null) {
                 matched = systemDepts.stream()
-                    .filter(d -> d.getDeptName().contains(dingDeptName) || 
-                                dingDeptName.contains(d.getDeptName()))
+                    .filter(d -> d.getDeptName().equals(dingDeptName))
                     .findFirst()
                     .orElse(null);
                 if (matched != null) {
-                    log.info("通过部门名称模糊匹配: {} -> {}", dingDeptName, matched.getDeptName());
+                    log.info("通过部门名称精确匹配: {} -> {}", dingDeptName, matched.getDeptName());
+                }
+            }
+            
+            // 3. 通过部门名称模糊匹配，优先选择层级更深的部门（有parentId的）
+            if (matched == null && dingDeptName != null) {
+                List<Department> fuzzyMatched = systemDepts.stream()
+                    .filter(d -> d.getDeptName().contains(dingDeptName) || 
+                                dingDeptName.contains(d.getDeptName()))
+                    .collect(Collectors.toList());
+                
+                if (!fuzzyMatched.isEmpty()) {
+                    // 优先选择层级更深的部门（有parentId的优先，然后按名称相似度排序）
+                    matched = fuzzyMatched.stream()
+                        .sorted((a, b) -> {
+                            // 1. 优先选择有parentId的（子部门）
+                            int levelCompare = Boolean.compare(a.getParentId() == null, b.getParentId() == null);
+                            if (levelCompare != 0) return levelCompare;
+                            
+                            // 2. 如果都有或都没有parentId，按名称长度差异排序（越接近越好）
+                            int diffA = Math.abs(a.getDeptName().length() - dingDeptName.length());
+                            int diffB = Math.abs(b.getDeptName().length() - dingDeptName.length());
+                            return Integer.compare(diffA, diffB);
+                        })
+                        .findFirst()
+                        .orElse(null);
+                    
+                    if (matched != null) {
+                        log.info("通过部门名称模糊匹配: {} -> {} (候选数: {})", 
+                                dingDeptName, matched.getDeptName(), fuzzyMatched.size());
+                    }
                 }
             }
             
@@ -1334,6 +1363,18 @@ public class UserService {
             }
         }
         
+        // 对匹配结果进行排序：优先返回层级更深的部门
+        if (matchedDeptIds.size() > 1) {
+            matchedDeptIds.sort((id1, id2) -> {
+                Department d1 = systemDepts.stream().filter(d -> d.getId().equals(id1)).findFirst().orElse(null);
+                Department d2 = systemDepts.stream().filter(d -> d.getId().equals(id2)).findFirst().orElse(null);
+                if (d1 == null || d2 == null) return 0;
+                // 有parentId的排前面
+                return Boolean.compare(d1.getParentId() == null, d2.getParentId() == null);
+            });
+            log.info("部门匹配结果排序后（优先子部门）: {}", matchedDeptIds);
+        }
+        
         return matchedDeptIds;
     }