1.查看原本的镜像地址
npm get registry
> https://registry.npmjs.org/
设成淘宝的
npm config set registry http://registry.npm.taobao.org/
将npm替换为cnpm
npm install -g cnpm --registry=https://registry.npm.taobao.org
2.换成原来的
npm config set registry https://registry.npmjs.org/
原文：https://www.cnblogs.com/houjl/p/13141410.html