diff --git a/py12306/config.py b/py12306/config.py
index 0e69ef3..8709dcb 100644
--- a/py12306/config.py
+++ b/py12306/config.py
@@ -90,6 +90,9 @@ class Config:
     CDN_ITEM_FILE = PROJECT_DIR + 'data/cdn.txt'
     CDN_ENABLED_AVAILABLE_ITEM_FILE = QUERY_DATA_DIR + 'available.json'
 
+    # Default time out
+    TIME_OUT_OF_REQUEST = 5
+
     envs = []
     retry_time = 5
     last_modify_time = 0
diff --git a/py12306/helpers/request.py b/py12306/helpers/request.py
index a24606c..a65e3af 100644
--- a/py12306/helpers/request.py
+++ b/py12306/helpers/request.py
@@ -53,6 +53,9 @@ class Request(HTMLSession):
 
     def request(self, *args, **kwargs):  # 拦截所有错误
         try:
+            if not 'timeout' in kwargs:
+                from py12306.config import Config
+                kwargs['timeout'] = Config().TIME_OUT_OF_REQUEST
             response = super().request(*args, **kwargs)
             return response
         except RequestException as e: