diff --git a/app/api/routers/rbac_operator.py b/app/api/routers/rbac_operator.py
index f621004..b33fb95 100644
--- a/app/api/routers/rbac_operator.py
+++ b/app/api/routers/rbac_operator.py
@@ -214,6 +214,37 @@ async def compute_provision(
     )
 
 
+@router.post("/compute/sync-users", summary="同步引擎用户=平台总用户（对账）")
+async def sync_compute_users(
+    request: Request,
+    db: Database = Depends(get_db),
+    actor: dict = Depends(require_roles("operator")),
+):
+    """把平台全部用户对账到引擎：建号(幂等) + 缺令牌则签一枚 PAT，保证 engine 用户 = 平台用户。"""
+    users = await db.users.list()
+    created = pats = 0
+    for u in users:
+        uname = u.get("username")
+        if not uname:
+            continue
+        try:
+            await compute_client.ensure_user(uname)
+            created += 1
+        except Exception:  # noqa: BLE001
+            pass
+        try:
+            toks = await compute_client.list_user_tokens(uname)
+            if not toks:
+                await compute_client.issue_pat(uname)
+                pats += 1
+        except Exception:  # noqa: BLE001
+            pass
+    await write_audit(db, action="compute.sync_users", resource="compute",
+                resource_id="__all__", detail=f"users={len(users)}",
+                user=actor, request=request)
+    return {"total": len(users), "synced": created, "pat_issued": pats}
+
+
 @router.api_route(
     "/compute/proxy/{path:path}",
     methods=["GET", "POST", "PUT", "DELETE", "PATCH"],
diff --git a/app/services/compute_client.py b/app/services/compute_client.py
index 1a0a940..f98094c 100644
--- a/app/services/compute_client.py
+++ b/app/services/compute_client.py
@@ -119,6 +119,14 @@ async def issue_user_token(username: str, name: str = "") -> dict:
     return data.get("data") or {}
 
 
+async def ensure_user(username: str) -> dict:
+    """幂等建引擎用户：已存在(409/4xx)视为成功，不抛。"""
+    try:
+        return await create_user(username)
+    except ComputeError:
+        return {"username": username, "already": True}
+
+
 async def list_models(status: int = 1) -> list[dict]:
     """列出引擎 admin 模型（models 表）。返回分页 items 列表。"""
     data = await _request(