diff --git a/_biliarchiver_archive_bvid.py b/_biliarchiver_archive_bvid.py
index e15ada6..5ebd4dc 100644
--- a/_biliarchiver_archive_bvid.py
+++ b/_biliarchiver_archive_bvid.py
@@ -34,9 +34,10 @@ async def new_get_subtitle_info(client: httpx.AsyncClient, bvid, cid):
 api.get_subtitle_info = new_get_subtitle_info
 
 
-async def archive_bvid(d: DownloaderBilibili, bvid: str):
+async def archive_bvid(d: DownloaderBilibili, bvid: str, logined: bool=False):
     assert d.hierarchy is True, 'hierarchy 必须为 True' # 为保持后续目录结构、文件命名的一致性
     assert d.client.cookies.get('SESSDATA') is not None, 'sess_data 不能为空' # 开个大会员呗，能下 4k 呢。
+    assert logined is True, '请先检查 SESSDATA 是否过期，再将 logined 设置为 True' # 防误操作
     assert os.path.exists('biliarchiver.home'), '先创建 biliarchiver.home 文件' # 防误操作
 
     videos_basepath = f'biliarchiver/videos/{bvid}'
diff --git a/biliarchiver_archive_bvids.py b/biliarchiver_archive_bvids.py
index 152c0e5..0982ad6 100644
--- a/biliarchiver_archive_bvids.py
+++ b/biliarchiver_archive_bvids.py
@@ -6,7 +6,7 @@ from _biliarchiver_archive_bvid import archive_bvid
 
 from bilix.sites.bilibili.downloader import DownloaderBilibili
 from rich.console import Console
-
+from httpx import Client
 from rich.traceback import install
 install()
 
@@ -33,11 +33,16 @@ def main():
 
     d = DownloaderBilibili(video_concurrency=tasks_limit, part_concurrency=1, hierarchy=True, sess_data=args.sess_data,
     )
+
+    logined = is_login(Client(cookies=d.client.cookies, headers=d.client.headers))
+    if not logined:
+        return
+
     d.progress.start()
     for bvid in bvids:
         while len(asyncio.all_tasks(loop)) > tasks_limit:
             loop.run_until_complete(asyncio.sleep(0.01))
-        task = loop.create_task(archive_bvid(d, bvid))
+        task = loop.create_task(archive_bvid(d, bvid, logined=logined))
     
 
 
@@ -46,6 +51,15 @@ def get_sess_data():
         sess_data = f.read().strip()
     return sess_data
 
+def is_login(cilent: Client) -> bool:
+    r = cilent.get('https://api.bilibili.com/x/member/web/account')
+    r.raise_for_status()
+    nav_json = r.json()
+    if nav_json['code'] == 0:
+        print('用户登录成功')
+        return True
+    print('未登录/SESSDATA无效/过期')
+    return False
 
 if __name__ == '__main__':
     try: