diff --git a/tool.py b/tool.py
index 4b21148..e7ffd07 100644
--- a/tool.py
+++ b/tool.py
@@ -45,7 +45,7 @@ def get_record(msg, client):
                                           int(date_str[8:10]), int(time_str[:2]),
                                           int(time_str[3:5]))
             # 比较文件时间和创建时间
-            if file_time > create_time_:
+            if file_time == create_time_:
                 file_name_ = filename
     if file_name_ == '':
         client.publish('error', payload='没有该文件', qos=0)