原因是资源的问题,要配置淘宝镜像
npm config set registry https://registry.npm.taobao.org

配置完成后检验是否成功
npm config get registry

重新安装
npm install npm -g

查看所用的镜像
npm ls

安装成功
C:\Users\Administrator>npm install npm -g
npm WARN deprecated coffee-script@1.7.1: CoffeeScript on NPM has moved to 
"coffeescript" (no hyphen)
C:\Users\Administrator\AppData\Roaming\npm\nrm -> 
C:\Users\Administrator\AppData\Roaming\npm\node_modules\nrm\cli.js
+ nrm@1.2.1
added 494 packages from 873 contributors in 40.88s

 

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