安装 nrm

npm i -g nrm 

查看下载镜像源

nrm ls

输出如下

  npm ---- https://registry.npmjs.org/
  cnpm --- http://r.cnpmjs.org/ * taobao - https://registry.npm.taobao.org/ nj ----- https://registry.nodejitsu.com/ npmMirror https://skimdb.npmjs.com/registry/ edunpm - http://registry.enpmjs.org/

切换镜像源

nrm use taobao