在powershell命令行里依次运行

1.  (new-object Net.WebClient).DownloadString("http://psget.net/GetPsGet.ps1") | iex

2.  install-module posh-git

如果你的系统是64位的，可能会报错

"D:\我的资料库\Documents\WindowsPowerShell\Modules" is added to the PSModulePath environment variable
Creating PowerShell profile...
D:\我的资料库\Documents\WindowsPowerShell\NuGet_profile.ps1
Could not find git command. Please create a git alias or add %ProgramFiles%\Git\cmd to PATH.
Module posh-git was successfully installed.
git command could not be found. Please create an alias or add it to your PATH.

这是只要在系统环境变量里加入如下命令即可

变量名：GIT_DIR

变量值：C:\Program Files (x86)\Git\cmd

注意变量值为你系统安装git的路径位置

powershell里添加对git的支持