diff --git a/pipeline_service/work_env.py b/pipeline_service/work_env.py
index b432bc3..70d2b52 100644
--- a/pipeline_service/work_env.py
+++ b/pipeline_service/work_env.py
@@ -204,6 +204,19 @@ def _validate_remote(remote_config: dict) -> str:
 # 目录迁移
 # ═══════════════════════════════════════════════════════════
 
+async def _remote_mkdir(env: dict, remote_dir: str) -> bool:
+    """远程 mkdir -p（相对路径可能多级，rsync 不会递归建父目录）。失败返回 False。"""
+    try:
+        target = _ssh_target(env)
+        ssh_cmd = ["ssh"] + _ssh_common_args(env) + [target, "mkdir -p " + shlex.quote(remote_dir)]
+        proc = await asyncio.create_subprocess_exec(
+            *ssh_cmd, stdout=asyncio.subprocess.DEVNULL, stderr=asyncio.subprocess.DEVNULL)
+        await asyncio.wait_for(proc.communicate(), timeout=30)
+        return proc.returncode == 0
+    except Exception:
+        return False
+
+
 async def migrate_work_dir(account_name: str, from_mode: str, to_mode: str, env: dict) -> dict:
     """把工作目录内容从旧环境迁移到新环境。
 
@@ -231,6 +244,7 @@ async def migrate_work_dir(account_name: str, from_mode: str, to_mode: str, env:
             remote_dir = env.get("remote_dir", "")
             if not remote_dir:
                 return {"ok": False, "error": "缺少远程目录 remote_dir"}
+            await _remote_mkdir(env, _resolve_remote_dir(remote_dir))
             target = _ssh_target(env) + ":" + _resolve_remote_dir(remote_dir)
             cmd = ["rsync", "-az", "--delete", "-e",
                    "ssh " + " ".join(_ssh_common_args(env)),