diff --git a/app/integrations/didi.py b/app/integrations/didi.py
index 4ebef44..8313008 100644
--- a/app/integrations/didi.py
+++ b/app/integrations/didi.py
@@ -246,9 +246,10 @@ class DidiClient(BaseClient):
         member_id: str | None,
         employee_number: str | None,
         legal_entity_id: str,
+        nickname: str | None = None,
     ) -> None:
         """
-        员工修改：更新员工所在公司主体（legal_entity_id）
+        员工修改：更新员工所在公司主体（legal_entity_id）/昵称（nickname）
         POST /river/Member/edit
         """
         if not member_id and not employee_number:
@@ -258,7 +259,11 @@ class DidiClient(BaseClient):
 
         token = self._get_access_token()
         ts = int(time.time())
-        data_str = self.dumps_data_for_sign({"legal_entity_id": legal_entity_id})
+        data_obj: dict[str, Any] = {"legal_entity_id": legal_entity_id}
+        nickname_v = str(nickname or "").strip()
+        if nickname_v:
+            data_obj["nickname"] = nickname_v
+        data_str = self.dumps_data_for_sign(data_obj)
         body: dict[str, Any] = {
             "client_id": self.client_id,
             "access_token": token,
diff --git a/extensions/sync_oa_to_didi/job.py b/extensions/sync_oa_to_didi/job.py
index aa71ca3..c290e00 100644
--- a/extensions/sync_oa_to_didi/job.py
+++ b/extensions/sync_oa_to_didi/job.py
@@ -175,10 +175,10 @@ class SyncOAToDidiExportFormJob(BaseJob):
 
 class SyncOAToDidiLegalEntitySyncJob(BaseJob):
     """
-    从 OA 无流程表单导出中读取“工号/所属公司”，并同步到滴滴：
+    从 OA 无流程表单导出中读取“工号/所属公司/受益部门名称”，并同步到滴滴：
     - 公司主体：GET /river/LegalEntity/get（keyword=name），name 完全相等优先
     - 员工查询：GET /river/Member/detail（employee_number=工号）
-    - 员工更新：POST /river/Member/edit（更新 legal_entity_id）
+    - 员工更新：POST /river/Member/edit（更新 legal_entity_id + nickname）
 
     public_cfg:
       - oa_base_url: "https://oa.example.com:8090"
@@ -260,6 +260,7 @@ class SyncOAToDidiLegalEntitySyncJob(BaseJob):
 
         emp_field: str | None = None
         company_field: str | None = None
+        benefit_dept_field: str | None = None
         sync_field: str | None = None
         for f in fields:
             if not isinstance(f, dict):
@@ -270,10 +271,12 @@ class SyncOAToDidiLegalEntitySyncJob(BaseJob):
                 emp_field = name
             if display == "所属公司" and name:
                 company_field = name
+            if display == "受益部门名称" and name:
+                benefit_dept_field = name
             if display == "是否同步滴滴" and name:
                 sync_field = name
-        if not emp_field or not company_field:
-            raise RuntimeError("OA export invalid: cannot locate fields for 工号/所属公司 in definition.fields")
+        if not emp_field or not company_field or not benefit_dept_field:
+            raise RuntimeError("OA export invalid: cannot locate fields for 工号/所属公司/受益部门名称 in definition.fields")
 
         rows = form.get("data") or []
         if not isinstance(rows, list):
@@ -311,12 +314,16 @@ class SyncOAToDidiLegalEntitySyncJob(BaseJob):
 
                 emp_obj = master.get(emp_field) or {}
                 comp_obj = master.get(company_field) or {}
+                benefit_dept_obj = master.get(benefit_dept_field) or {}
                 emp_no = ""
                 comp_name = ""
+                benefit_dept_name = ""
                 if isinstance(emp_obj, dict):
                     emp_no = str(emp_obj.get("value") or emp_obj.get("showValue") or "").strip()
                 if isinstance(comp_obj, dict):
                     comp_name = str(comp_obj.get("value") or comp_obj.get("showValue") or "").strip()
+                if isinstance(benefit_dept_obj, dict):
+                    benefit_dept_name = str(benefit_dept_obj.get("value") or benefit_dept_obj.get("showValue") or "").strip()
 
                 if not emp_no or not comp_name:
                     skipped += 1
@@ -336,7 +343,7 @@ class SyncOAToDidiLegalEntitySyncJob(BaseJob):
                         logger.warning("跳过：是否同步滴滴=N employee_number=%s company_name=%s", emp_no, comp_name)
                         continue
 
-                logger.info("正在处理：工号=%s 所属公司=%s", emp_no, comp_name)
+                logger.info("正在处理：工号=%s 所属公司=%s 受益部门名称=%s", emp_no, comp_name, benefit_dept_name)
 
                 # 公司主体匹配（进程内缓存）
                 legal_entity_id = cache_legal_entity.get(comp_name)
@@ -398,11 +405,27 @@ class SyncOAToDidiLegalEntitySyncJob(BaseJob):
 
                 # 员工更新（按文档要求：连续修改间隔 >=150ms）
                 try:
-                    logger.info("正在更新员工公司主体：member_id=%s legal_entity_id=%s", member_id, legal_entity_id)
-                    didi.edit_member_legal_entity(company_id=company_id, member_id=member_id, employee_number=None, legal_entity_id=legal_entity_id)
+                    logger.info(
+                        "正在更新员工公司主体与昵称：member_id=%s legal_entity_id=%s nickname=%s",
+                        member_id,
+                        legal_entity_id,
+                        benefit_dept_name,
+                    )
+                    didi.edit_member_legal_entity(
+                        company_id=company_id,
+                        member_id=member_id,
+                        employee_number=None,
+                        legal_entity_id=legal_entity_id,
+                        nickname=benefit_dept_name or None,
+                    )
                     updated += 1
                     time.sleep(0.15)
-                    logger.info("同步成功：employee_number=%s legal_entity_id=%s", emp_no, legal_entity_id)
+                    logger.info(
+                        "同步成功：employee_number=%s legal_entity_id=%s nickname=%s",
+                        emp_no,
+                        legal_entity_id,
+                        benefit_dept_name,
+                    )
                 except Exception as e:  # noqa: BLE001
                     skipped += 1
                     msg = f"Member.edit failed employee_number={emp_no!r} member_id={member_id!r} err={e!r}"