修改C:\users\[用户名]下的.npmrc文件：
registry=https://registry.npm.taobao.org/
distury=https://npm.taobao.org/dist
sass-binary-site=https://npm.taobao.org/mirrors/node-sass
npm set registry=https://registry.npm.taobao.org/
npm set distury=https://npm.taobao.org/dist
npm set sass-binary-site=https://npm.taobao.org/mirrors/node-sass
原文：http://www.cnblogs.com/ret00100/p/7609082.html