diff --git a/全局热键/HotKey.py b/全局热键/HotKey.py
index 095c87f..3439023 100644
--- a/全局热键/HotKey.py
+++ b/全局热键/HotKey.py
@@ -11,7 +11,7 @@ Created on 2017年12月11日
 '''
 import sys
 
-from PyQt5.QtCore import QTimer, pyqtSignal, Qt
+from PyQt5.QtCore import pyqtSignal, Qt
 from PyQt5.QtWidgets import QWidget, QApplication, QVBoxLayout, QTextBrowser, QPushButton,\
     QMessageBox
 import keyboard
diff --git a/全局热键/README.md b/全局热键/README.md
index 759dc50..0e0eeef 100644
--- a/全局热键/README.md
+++ b/全局热键/README.md
@@ -4,10 +4,20 @@ pip install keyboard
 
 https://github.com/892768447/keyboard
 
-说明:
- 
- - keyboard模块使用全局低级钩子的方式hook键盘来处理,对系统有一定的影响
- - 有反映说弹出对话框假死,这里粗略解决下使用信号槽的方式来弹出对话框
+* keyboard
+    * 该模块使用全局低级钩子的方式hook键盘来处理,对系统有一定的影响
+    * 有反映说弹出对话框假死,这里粗略解决下使用信号槽的方式来弹出对话框
+    * 该模块里使用了每次产生一个子线程来回调函数
+```
+def call_later(fn, args=(), delay=0.001):
+    """
+    Calls the provided function in a new thread after waiting some time.
+    Useful for giving the system some time to process an event, without blocking
+    the current execution flow.
+    """
+    thread = _Thread(target=lambda: (_time.sleep(delay), fn(*args)))
+    thread.start()
+```
 
 # 截图
 ![截图](ScreenShot/1.gif)
\ No newline at end of file