1.按win+r进入运行模式，然后输入cmd进入命令行

2.输入pip按回车 查看命令帮助

3.然后输入pip install selenium 按回车，然后等待

下载，下载好了会自动安装完成

3.然后输入 pip show selenium 按回车，安装成功就会显示

Name: selenium
Version: 3.0.1
Summary: Python bindings for Selenium
Home-page: https://github.com/SeleniumHQ/selenium/
Author: UNKNOWN
Author-email: UNKNOWN
License: UNKNOWN
Location: d:\mypython3.5_all\python3.5\lib\site-packages
Requires:

wind安装selenium