diff --git a/app/integrations/__init__.py b/app/integrations/__init__.py
index ebbf4bc..4d53d5e 100644
--- a/app/integrations/__init__.py
+++ b/app/integrations/__init__.py
@@ -1,6 +1,7 @@
 """系统集成适配器"""
 
 from app.integrations.base import BaseClient
+from app.integrations.didi import DidiClient
 from app.integrations.seeyon import SeeyonClient
 
-__all__ = ["BaseClient", "SeeyonClient"]
\ No newline at end of file
+__all__ = ["BaseClient", "DidiClient", "SeeyonClient"]
\ No newline at end of file
diff --git a/app/integrations/didi.py b/app/integrations/didi.py
new file mode 100644
index 0000000..4ebef44
--- /dev/null
+++ b/app/integrations/didi.py
@@ -0,0 +1,411 @@
+from __future__ import annotations
+
+import hashlib
+import json as jsonlib
+import logging
+import time
+from typing import Any
+
+import httpx
+
+from app.integrations.base import BaseClient
+
+
+logger = logging.getLogger("connecthub.integrations.didi")
+
+
+def _contains_unsupported_sign_chars(s: str) -> bool:
+    # 文档提示：签名中不支持 \0 \t \n \x0B \r 以及空格进行加密处理。
+    # 这里仅做检测与告警，不自动清洗，避免服务端/客户端不一致。
+    return any(ch in s for ch in ("\0", "\t", "\n", "\x0b", "\r", " "))
+
+
+class DidiClient(BaseClient):
+    """
+    滴滴管理 API Client（2024 版）：
+    - POST /river/Auth/authorize 获取 access_token（建议缓存半小时；401 刷新后重试一次）
+    - 按文档规则生成 sign（默认 MD5）
+    参考：
+    - https://opendocs.xiaojukeji.com/version2024/10951
+    - https://opendocs.xiaojukeji.com/version2024/10945
+    """
+
+    def __init__(
+        self,
+        *,
+        base_url: str,
+        client_id: str,
+        client_secret: str,
+        sign_key: str,
+        grant_type: str = "client_credentials",
+        token_skew_s: int = 30,
+        timeout_s: float = 10.0,
+        retries: int = 2,
+        retry_backoff_s: float = 0.5,
+        headers: dict[str, str] | None = None,
+    ) -> None:
+        super().__init__(
+            base_url=base_url,
+            timeout_s=timeout_s,
+            retries=retries,
+            retry_backoff_s=retry_backoff_s,
+            headers=headers,
+        )
+        self.client_id = client_id
+        self.client_secret = client_secret
+        self.sign_key = sign_key
+        self.grant_type = grant_type
+        self.token_skew_s = token_skew_s
+
+        self._access_token: str | None = None
+        self._token_expires_at: float | None = None
+        self._token_type: str | None = None
+
+    def gen_sign(self, params: dict[str, Any], *, sign_method: str = "md5") -> str:
+        """
+        签名算法（默认 MD5）：
+        1) 将 sign_key 加入参与签名参数（不参与传递，仅参与计算）
+        2) 参数名升序排序
+        3) 以 & 连接成 a=xxx&b=yyy...
+        4) md5/sha256 得到 sign（小写 hex）
+        文档：https://opendocs.xiaojukeji.com/version2024/10945
+        """
+        if sign_method.lower() != "md5":
+            raise ValueError("Only md5 sign_method is supported in this client (default)")
+
+        p = dict(params or {})
+        p["sign_key"] = self.sign_key
+
+        # 排序并拼接
+        items: list[tuple[str, str]] = []
+        for k in sorted(p.keys()):
+            v = p.get(k)
+            sv = "" if v is None else str(v).strip()
+            items.append((str(k), sv))
+        sign_str = "&".join([f"{k}={v}" for k, v in items])
+
+        if _contains_unsupported_sign_chars(sign_str):
+            logger.warning("Didi sign_str contains unsupported chars per docs (signing anyway)")
+
+        return hashlib.md5(sign_str.encode("utf-8")).hexdigest()
+
+    def authorize(self) -> str:
+        """
+        授权获取 access_token：
+        POST /river/Auth/authorize
+        文档：https://opendocs.xiaojukeji.com/version2024/10951
+        """
+        ts = int(time.time())
+        body: dict[str, Any] = {
+            "client_id": self.client_id,
+            "client_secret": self.client_secret,
+            "grant_type": self.grant_type,
+            "timestamp": ts,
+        }
+        body["sign"] = self.gen_sign(body)
+
+        resp = super().request(
+            "POST",
+            "/river/Auth/authorize",
+            json=body,
+            headers={"Content-Type": "application/json"},
+        )
+        data = resp.json() if resp.content else {}
+        access_token = str(data.get("access_token", "") or "")
+        expires_in = int(data.get("expires_in", 0) or 0)
+        token_type = str(data.get("token_type", "") or "Bearer")
+
+        if not access_token:
+            raise RuntimeError("Didi authorize failed (access_token missing)")
+
+        now = time.time()
+        skew = max(0, int(self.token_skew_s or 0))
+        # expires_in 单位秒；按文档通常为 1800
+        self._access_token = access_token
+        self._token_type = token_type
+        self._token_expires_at = now + max(0, expires_in - skew)
+        logger.info("Didi access_token acquired (cached) expires_in=%s token_type=%s", expires_in, token_type)
+        return access_token
+
+    def _get_access_token(self) -> str:
+        now = time.time()
+        if self._access_token and self._token_expires_at and now < self._token_expires_at:
+            return self._access_token
+        return self.authorize()
+
+    def _build_signed_query(self, *, company_id: str, extra_params: dict[str, Any]) -> dict[str, Any]:
+        """
+        构造“参与签名且实际传递”的 query 参数（不包含 sign_key）：
+        - client_id/access_token/company_id/timestamp + extra_params + sign
+        """
+        token = self._get_access_token()
+        ts = int(time.time())
+        params: dict[str, Any] = {
+            "client_id": self.client_id,
+            "access_token": token,
+            "company_id": company_id,
+            "timestamp": ts,
+        }
+        if extra_params:
+            params.update(extra_params)
+        params["sign"] = self.gen_sign({k: v for k, v in params.items() if k != "sign"})
+        return params
+
+    @staticmethod
+    def _raise_if_errno(api_name: str, payload: Any) -> None:
+        try:
+            errno = payload.get("errno")
+            errmsg = payload.get("errmsg")
+        except Exception as e:  # noqa: BLE001
+            raise RuntimeError(f"{api_name} invalid response (not a dict)") from e
+        if errno is None:
+            raise RuntimeError(f"{api_name} invalid response (errno missing)")
+        try:
+            errno_i = int(errno)
+        except Exception:
+            errno_i = -1
+        if errno_i != 0:
+            raise RuntimeError(f"{api_name} failed errno={errno} errmsg={errmsg!r}")
+
+    def get_legal_entities(
+        self,
+        *,
+        company_id: str,
+        offset: int,
+        length: int,
+        keyword: str | None = None,
+        legal_entity_id: str | None = None,
+        out_legal_entity_id: str | None = None,
+    ) -> dict[str, Any]:
+        """
+        公司主体查询：
+        GET /river/LegalEntity/get
+        """
+        extra: dict[str, Any] = {"offset": offset, "length": length}
+        if keyword:
+            extra["keyword"] = keyword
+        if legal_entity_id:
+            extra["legal_entity_id"] = legal_entity_id
+        if out_legal_entity_id:
+            extra["out_legal_entity_id"] = out_legal_entity_id
+
+        params = self._build_signed_query(company_id=company_id, extra_params=extra)
+        resp = super().request(
+            "GET",
+            "/river/LegalEntity/get",
+            params=params,
+            headers={"Content-Type": "application/x-www-form-urlencoded"},
+        )
+        payload = resp.json() if resp.content else {}
+        self._raise_if_errno("LegalEntity.get", payload)
+        data = payload.get("data") or {}
+        if not isinstance(data, dict):
+            raise RuntimeError("LegalEntity.get invalid response (data not a dict)")
+        return data  # {total, records}
+
+    def get_member_detail(
+        self,
+        *,
+        company_id: str,
+        employee_number: str | None = None,
+        member_id: str | None = None,
+        phone: str | None = None,
+    ) -> dict[str, Any]:
+        """
+        员工明细：
+        GET /river/Member/detail
+        """
+        extra: dict[str, Any] = {}
+        if member_id:
+            extra["member_id"] = member_id
+        elif employee_number:
+            extra["employee_number"] = employee_number
+        elif phone:
+            extra["phone"] = phone
+        else:
+            raise ValueError("member_id/employee_number/phone cannot all be empty")
+
+        params = self._build_signed_query(company_id=company_id, extra_params=extra)
+        resp = super().request(
+            "GET",
+            "/river/Member/detail",
+            params=params,
+            headers={"Content-Type": "application/x-www-form-urlencoded"},
+        )
+        payload = resp.json() if resp.content else {}
+        self._raise_if_errno("Member.detail", payload)
+        data = payload.get("data") or {}
+        if not isinstance(data, dict):
+            raise RuntimeError("Member.detail invalid response (data not a dict)")
+        return data
+
+    def edit_member_legal_entity(
+        self,
+        *,
+        company_id: str,
+        member_id: str | None,
+        employee_number: str | None,
+        legal_entity_id: str,
+    ) -> None:
+        """
+        员工修改：更新员工所在公司主体（legal_entity_id）
+        POST /river/Member/edit
+        """
+        if not member_id and not employee_number:
+            raise ValueError("member_id or employee_number is required")
+        if not legal_entity_id:
+            raise ValueError("legal_entity_id is required")
+
+        token = self._get_access_token()
+        ts = int(time.time())
+        data_str = self.dumps_data_for_sign({"legal_entity_id": legal_entity_id})
+        body: dict[str, Any] = {
+            "client_id": self.client_id,
+            "access_token": token,
+            "company_id": company_id,
+            "timestamp": ts,
+            "data": data_str,
+        }
+        if member_id:
+            body["member_id"] = member_id
+        if employee_number:
+            body["employee_number"] = employee_number
+
+        body["sign"] = self.gen_sign({k: v for k, v in body.items() if k != "sign"})
+
+        resp = super().request(
+            "POST",
+            "/river/Member/edit",
+            json=body,
+            headers={"Content-Type": "application/json"},
+        )
+        payload = resp.json() if resp.content else {}
+        self._raise_if_errno("Member.edit", payload)
+        return None
+
+    def request_authed(
+        self,
+        method: str,
+        path: str,
+        *,
+        params: dict[str, Any] | None = None,
+        json: Any = None,
+        data: Any = None,
+        headers: dict[str, str] | None = None,
+        signed_params: dict[str, Any] | None = None,
+        **kwargs: Any,
+    ) -> httpx.Response:
+        """
+        统一带 token +（可选）签名的请求：
+        - Authorization: Bearer <access_token>
+        - 若 signed_params 提供：自动补 timestamp 与 sign，并注入到 json/params/data（优先注入到 dict 类型的 json，其次 params，再次 data，否则默认注入 json dict）
+        - 遇到 401：清空 token，重新 authorize 后重试一次
+        """
+        token = self._get_access_token()
+        token_type = self._token_type or "Bearer"
+
+        extra_headers = dict(headers or {})
+        extra_headers["Authorization"] = f"{token_type} {token}"
+
+        sp: dict[str, Any] | None = None
+        if signed_params is not None:
+            sp = dict(signed_params)
+            if "timestamp" not in sp:
+                sp["timestamp"] = int(time.time())
+            # 如该接口签名参数包含 access_token，则需参与签名
+            if "access_token" in sp and not sp.get("access_token"):
+                sp["access_token"] = token
+            sp["sign"] = self.gen_sign({k: v for k, v in sp.items() if k != "sign"})
+
+        def _inject(target_json: Any, target_params: dict[str, Any] | None, target_data: Any) -> tuple[Any, dict[str, Any] | None, Any]:
+            if sp is None:
+                return target_json, target_params, target_data
+            if isinstance(target_json, dict):
+                merged = dict(target_json)
+                merged.update(sp)
+                return merged, target_params, target_data
+            if isinstance(target_params, dict):
+                merged_p = dict(target_params)
+                merged_p.update(sp)
+                return target_json, merged_p, target_data
+            if isinstance(target_data, dict):
+                merged_d = dict(target_data)
+                merged_d.update(sp)
+                return target_json, target_params, merged_d
+            # 默认注入到 json dict
+            return dict(sp), target_params, target_data
+
+        json2, params2, data2 = _inject(json, params, data)
+
+        try:
+            return super().request(method, path, params=params2, json=json2, data=data2, headers=extra_headers, **kwargs)
+        except httpx.HTTPStatusError as e:
+            resp = e.response
+            if resp.status_code != 401:
+                raise
+
+            # 401：token 无效或过期，刷新后仅重试一次
+            logger.info("Didi access_token invalid (401), refreshing and retrying once")
+            self._access_token = None
+            self._token_expires_at = None
+            self._token_type = None
+            token2 = self._get_access_token()
+            token_type2 = self._token_type or "Bearer"
+
+            extra_headers2 = dict(headers or {})
+            extra_headers2["Authorization"] = f"{token_type2} {token2}"
+
+            # 若签名参数中包含 access_token，需要更新并重新计算 sign
+            if signed_params is not None:
+                sp2 = dict(signed_params)
+                if "timestamp" not in sp2:
+                    sp2["timestamp"] = int(time.time())
+                if "access_token" in sp2:
+                    sp2["access_token"] = token2
+                sp2["sign"] = self.gen_sign({k: v for k, v in sp2.items() if k != "sign"})
+                json2_retry, params2_retry, data2_retry = _inject(json, params, data)
+                # _inject 使用闭包 sp；这里临时覆盖行为以避免额外结构改动
+                if isinstance(json, dict):
+                    json2_retry = dict(json)
+                    json2_retry.update(sp2)
+                elif isinstance(params, dict):
+                    params2_retry = dict(params)
+                    params2_retry.update(sp2)
+                elif isinstance(data, dict):
+                    data2_retry = dict(data)
+                    data2_retry.update(sp2)
+                else:
+                    json2_retry = dict(sp2)
+                return super().request(
+                    method,
+                    path,
+                    params=params2_retry,
+                    json=json2_retry,
+                    data=data2_retry,
+                    headers=extra_headers2,
+                    **kwargs,
+                )
+
+            return super().request(method, path, params=params2, json=json2, data=data2, headers=extra_headers2, **kwargs)
+
+    def post_signed_json(self, path: str, *, body: dict[str, Any]) -> httpx.Response:
+        """
+        便捷方法：JSON POST + 自动补 timestamp/sign + 自动带 Authorization。
+        注意：如 body 内包含复杂字段（例如 data 为对象），建议调用方先 json.dumps(...) 成字符串再参与签名。
+        """
+        if not isinstance(body, dict):
+            raise ValueError("body must be a dict")
+        return self.request_authed(
+            "POST",
+            path,
+            json=body,
+            signed_params=body,
+            headers={"Content-Type": "application/json"},
+        )
+
+    @staticmethod
+    def dumps_data_for_sign(data_obj: Any) -> str:
+        """
+        将复杂 data 对象序列化为“参与签名的字符串”（紧凑 JSON），以贴近文档示例。
+        """
+        return jsonlib.dumps(data_obj, ensure_ascii=False, separators=(",", ":"))
diff --git a/extensions/sync_oa_to_didi/job.py b/extensions/sync_oa_to_didi/job.py
index aef06d5..246d831 100644
--- a/extensions/sync_oa_to_didi/job.py
+++ b/extensions/sync_oa_to_didi/job.py
@@ -1,8 +1,11 @@
 from __future__ import annotations
 
+import json
 import logging
+import time
 from typing import Any
 
+from app.integrations.didi import DidiClient
 from app.integrations.seeyon import SeeyonClient
 from app.jobs.base import BaseJob
 
@@ -99,7 +102,7 @@ class SyncOAToDidiExportFormJob(BaseJob):
     secret_cfg (解密后):
       - rest_user
       - rest_password
-      - loginName (可选)
+      - loginName
     """
 
     job_id = "sync_oa_to_didi.export_form_soap"
@@ -170,3 +173,209 @@ 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：
+    - 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）
+
+    public_cfg:
+      - oa_base_url: "https://oa.example.com:8090"
+      - oa_templateCode: "employee"
+      - didi_base_url: "https://api.es.xiaojukeji.com"
+      - senderLoginName/rightId/doTrigger/param/extra: 可选（透传到 OA 导出）
+
+    secret_cfg (解密后):
+      - rest_user/rest_password/loginName: OA 登录
+      - company_id/client_id/client_secret/sign_key: 滴滴凭证
+      - phone: 可选（此 Job 不使用）
+    """
+
+    job_id = "sync_oa_to_didi.sync_legal_entity"
+
+    def run(self, params: dict[str, Any], secrets: dict[str, Any]) -> dict[str, Any]:
+        oa_base_url = str(params.get("oa_base_url") or "").strip()
+        if not oa_base_url:
+            raise ValueError("public_cfg.oa_base_url is required")
+        oa_template_code = str(params.get("oa_templateCode") or "").strip()
+        if not oa_template_code:
+            raise ValueError("public_cfg.oa_templateCode is required")
+
+        didi_base_url = str(params.get("didi_base_url") or "").strip()
+        if not didi_base_url:
+            raise ValueError("public_cfg.didi_base_url is required")
+
+        rest_user = str(secrets.get("rest_user") or "").strip()
+        rest_password = str(secrets.get("rest_password") or "").strip()
+        login_name = secrets.get("loginName")
+        login_name = str(login_name).strip() if login_name else None
+        if not rest_user or not rest_password:
+            raise ValueError("secret_cfg.rest_user and secret_cfg.rest_password are required")
+
+        company_id = str(secrets.get("company_id") or "").strip()
+        client_id = str(secrets.get("client_id") or "").strip()
+        client_secret = str(secrets.get("client_secret") or "").strip()
+        sign_key = str(secrets.get("sign_key") or "").strip()
+        if not company_id or not client_id or not client_secret or not sign_key:
+            raise ValueError("secret_cfg.company_id/client_id/client_secret/sign_key are required")
+
+        sender_login_name = params.get("senderLoginName")
+        sender_login_name = str(sender_login_name).strip() if sender_login_name else None
+        right_id = params.get("rightId")
+        right_id = str(right_id).strip() if right_id else None
+        do_trigger = params.get("doTrigger")
+        param = params.get("param")
+        param = str(param) if param is not None else None
+        extra = params.get("extra")
+        if extra is not None and not isinstance(extra, dict):
+            raise ValueError("public_cfg.extra must be a JSON object (dict) if provided")
+
+        seeyon = SeeyonClient(base_url=oa_base_url, rest_user=rest_user, rest_password=rest_password, loginName=login_name)
+        try:
+            resp = seeyon.export_cap4_form_soap(
+                templateCode=oa_template_code,
+                senderLoginName=sender_login_name,
+                rightId=right_id,
+                doTrigger=do_trigger,
+                param=param,
+                extra=extra,
+            )
+            raw = resp.text or ""
+        finally:
+            seeyon.close()
+
+        payload = json.loads(raw) if raw else {}
+        outer = payload.get("data") or {}
+        inner = outer.get("data") or {}
+        inner2 = inner.get("data") or {}
+
+        definition = inner2.get("definition") or {}
+        fields = definition.get("fields") or []
+        if not isinstance(fields, list):
+            raise RuntimeError("OA export invalid: definition.fields is not a list")
+
+        emp_field: str | None = None
+        company_field: str | None = None
+        for f in fields:
+            if not isinstance(f, dict):
+                continue
+            display = str(f.get("display") or "")
+            name = str(f.get("name") or "")
+            if display == "工号" and name:
+                emp_field = name
+            if display == "所属公司" and name:
+                company_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")
+
+        rows = inner2.get("data") or []
+        if not isinstance(rows, list):
+            raise RuntimeError("OA export invalid: data is not a list")
+
+        didi = DidiClient(
+            base_url=didi_base_url,
+            client_id=client_id,
+            client_secret=client_secret,
+            sign_key=sign_key,
+        )
+        try:
+            cache_legal_entity: dict[str, str] = {}
+            total_rows = 0
+            updated = 0
+            skipped = 0
+            errors: list[str] = []
+
+            for row in rows:
+                total_rows += 1
+                if not isinstance(row, dict):
+                    skipped += 1
+                    logger.warning("OA row is not a dict, skipped")
+                    continue
+                master = row.get("masterData") or {}
+                if not isinstance(master, dict):
+                    skipped += 1
+                    logger.warning("OA row masterData is not a dict, skipped")
+                    continue
+
+                emp_obj = master.get(emp_field) or {}
+                comp_obj = master.get(company_field) or {}
+                emp_no = ""
+                comp_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 not emp_no or not comp_name:
+                    skipped += 1
+                    logger.warning("Missing employee_number/company_name, skipped employee_number=%r company_name=%r", emp_no, comp_name)
+                    continue
+
+                # 公司主体匹配（进程内缓存）
+                legal_entity_id = cache_legal_entity.get(comp_name)
+                if not legal_entity_id:
+                    try:
+                        data = didi.get_legal_entities(company_id=company_id, offset=0, length=100, keyword=comp_name)
+                        records = data.get("records") or []
+                        if not isinstance(records, list):
+                            raise RuntimeError("LegalEntity.get invalid: records not a list")
+                        matches = [r for r in records if isinstance(r, dict) and str(r.get("name") or "") == comp_name]
+                        if len(matches) == 0:
+                            skipped += 1
+                            logger.warning("No exact legal entity match, skipped company_name=%r employee_number=%s", comp_name, emp_no)
+                            continue
+                        if len(matches) > 1:
+                            skipped += 1
+                            msg = f"Multiple exact legal entity matches company_name={comp_name!r} count={len(matches)}"
+                            errors.append(msg)
+                            logger.error(msg)
+                            continue
+                        legal_entity_id = str(matches[0].get("legal_entity_id") or "").strip()
+                        if not legal_entity_id:
+                            skipped += 1
+                            logger.warning("Exact match legal_entity_id empty, skipped company_name=%r", comp_name)
+                            continue
+                        cache_legal_entity[comp_name] = legal_entity_id
+                    except Exception as e:  # noqa: BLE001
+                        skipped += 1
+                        msg = f"LegalEntity lookup failed company_name={comp_name!r} err={e!r}"
+                        errors.append(msg)
+                        logger.warning(msg)
+                        continue
+
+                # 员工查询
+                try:
+                    member = didi.get_member_detail(company_id=company_id, employee_number=emp_no)
+                    member_id = str(member.get("member_id") or member.get("id") or "").strip()
+                    if not member_id:
+                        skipped += 1
+                        logger.warning("Member detail missing member_id/id, skipped employee_number=%s", emp_no)
+                        continue
+                except Exception as e:  # noqa: BLE001
+                    skipped += 1
+                    msg = f"Member.detail failed employee_number={emp_no!r} err={e!r}"
+                    errors.append(msg)
+                    logger.warning(msg)
+                    continue
+
+                # 员工更新（按文档要求：连续修改间隔 >=150ms）
+                try:
+                    didi.edit_member_legal_entity(company_id=company_id, member_id=member_id, employee_number=None, legal_entity_id=legal_entity_id)
+                    updated += 1
+                    time.sleep(0.15)
+                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}"
+                    errors.append(msg)
+                    logger.warning(msg)
+                    continue
+
+            return {
+                "total_rows": total_rows,
+                "updated_count": updated,
+                "skipped_count": skipped,
+                "errors": errors[:50],
+            }
+        finally:
+            didi.close()