diff --git a/middlewares.py b/middlewares.py
index ccd0724..9d69043 100644
--- a/middlewares.py
+++ b/middlewares.py
@@ -50,7 +50,7 @@ def precheck() -> bool: # 检查redis队列情况
             return True
         elif check == 'q':
             print("Exit.")
-            exit()
+            return
         else: print("invalid input!")
     return True
 
diff --git a/milkSpider.py b/milkSpider.py
index 5eab9f9..548ce48 100644
--- a/milkSpider.py
+++ b/milkSpider.py
@@ -1,5 +1,6 @@
 # -*- coding: utf-8 -*-
 
+import os
 import time
 
 import middlewares
@@ -42,6 +43,11 @@ def View():
 
 def milkSpider():
 
+    dir = 'Catalogues'
+    if os.path.exists(dir):
+        if len(os.listdir(dir)):
+            print("检测到缓存目录下已有数据，调用milkSpider将有可能导致数据重复和冗余。")
+
     print("注意：调用milkSpider将启动selenium以及requests进程，因为爬取数据量较大，往往会占用较多时间，确定吗？[c]continue or [q]quit：", end = '')
     flag = str(input())
     if flag == "q":
diff --git a/pipelines.py b/pipelines.py
index 488a866..6b8f10c 100644
--- a/pipelines.py
+++ b/pipelines.py
@@ -174,6 +174,11 @@ def write2csv(response, filename_csv):    # 写入到csv文件
                 fd.write(itemString)
 
     try:
+
+        dir = "Catalogues"
+        if not os.path.exists(dir):
+            os.mkdir(dir)
+            
         if os.path.exists(filename_csv):
             with open(filename_csv, 'a+', encoding = 'utf-8-sig') as fd:  # 存在，文件尾追加
                 writer(fd)