diff --git a/README.md b/README.md
index 2e6b20c..503ffaf 100644
--- a/README.md
+++ b/README.md
@@ -15,6 +15,7 @@ PlexPlaylistSync 是一个用于同步 Plex 播放列表和本地 `.m3u`/`.m3u8`
 ### Token 登录
 
 首次登录时使用用户名和密码连接 Plex 服务器，成功后程序会将获得的 `token` 保存在配置文件中，后续通信仅使用该 `token`，不再保存明文密码。
+默认情况下 Plex 服务器使用 `32400` 端口，可在未修改服务器端口时直接使用该默认值。
 
 ## 安装
 
diff --git a/app/config.json b/app/config.json
index 97f718a..a2822f8 100644
--- a/app/config.json
+++ b/app/config.json
@@ -2,6 +2,6 @@
     "theme": "light",
     "token": "",
     "server_url": "",
-    "server_port": "",
+    "server_port": "32400",
     "library": ""
 }
\ No newline at end of file
diff --git a/app/main.py b/app/main.py
index c0754f4..3019a28 100644
--- a/app/main.py
+++ b/app/main.py
@@ -32,7 +32,7 @@ async def login(
     user: str = Form(...),
     pw: str = Form(...),
     url: str = Form(...),
-    port: str = Form(...),
+    port: str = Form("32400"),
     library: str = Form(...)
 ):
     config = load_config()
diff --git a/app/templates/login.html b/app/templates/login.html
index 171d23a..bf2738f 100644
--- a/app/templates/login.html
+++ b/app/templates/login.html
@@ -19,7 +19,7 @@
     </div>
     <div class="mb-3">
         <label for="port" class="form-label">端口</label>
-        <input type="text" class="form-control" id="port" name="port" placeholder="32400">
+        <input type="text" class="form-control" id="port" name="port" value="32400">
     </div>
     <div class="mb-3">
         <label for="library" class="form-label">选择库</label>
diff --git a/app/utils/plex_client.py b/app/utils/plex_client.py
index a3fa1cb..db59ddb 100644
--- a/app/utils/plex_client.py
+++ b/app/utils/plex_client.py
@@ -2,7 +2,7 @@ from plexapi.myplex import MyPlexAccount
 from plexapi.server import PlexServer
 
 
-def connect_plex(config, username, password, url, port, library):
+def connect_plex(config, username, password, url, port="32400", library=""):
     """Return a connected PlexServer instance and update config with token and server info."""
     token = config.get("token")
     if not token: