diff --git a/src/api/bkuser_core/categories/plugins/ldap/helper.py b/src/api/bkuser_core/categories/plugins/ldap/helper.py
index 7184a9f3b..6e1c92cc5 100644
--- a/src/api/bkuser_core/categories/plugins/ldap/helper.py
+++ b/src/api/bkuser_core/categories/plugins/ldap/helper.py
@@ -8,11 +8,13 @@
 an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
 specific language governing permissions and limitations under the License.
 """
+import hashlib
 import logging
 from dataclasses import dataclass
 from typing import Dict, List, Optional, Type
 
 from django.db.models import Model
+from django.utils.encoding import force_bytes
 from django.utils.functional import cached_property
 from django.utils.translation import gettext_lazy as _
 from rest_framework.exceptions import ValidationError
@@ -101,13 +103,29 @@ def _handle_department(self, dept_info: LdapDepartment) -> Optional[Department]:
     def _insert_dept(self, dept_info: LdapDepartment, defaults: Dict) -> Department:
         # BUG: here, use dept_info.key_field to get dept -> it's full_name, not the code
         # the defaults["code"] is the not the `code`, it's the full_name
+
+        # code_hash = sha256(目录:full_name
+        # 1. 解决多个目录存在相同full_name的情况
+        # 2. 解决full_name超长截断冲突问题
+        code_hash = hashlib.sha256(force_bytes(f"{self.category.pk}:{dept_info.key_field}")).hexdigest()
+
+        # 判定 code_hash 是否存在, 是的话直接返回
+        dept2: Department = self.db_sync_manager.magic_get(code_hash, LdapDepartmentMeta)
+        if dept2:
+            return dept2
+
+        # 如果发现老的, 直接更新其 code=code_hash
         dept: Department = self.db_sync_manager.magic_get(dept_info.key_field, LdapDepartmentMeta)
         if dept:
             # Question: here update the code to real code, without magic_add, will not saved into db?
-            if dept_info.code and dept.code != dept_info.code:
-                dept.code = dept_info.code
+            # if dept_info.code and dept.code != dept_info.code:
+            #     dept.code = dept_info.code
+            if dept_info.code and dept_info.code != code_hash:
+                dept.code = code_hash
             return dept
 
+        # 无论是新的老的, 都更新 code_hash
+        defaults["code"] = code_hash
         # NOTE: 如果full_name在 db 里面已经有了, 这里是判断不出来的, 因为self.db_departments是当前category的集合, 不是全局的
         # 但是code字段是 db unique字段
         if dept_info.key_field in self.db_departments: