npm install node-sass --save-dev 		//安装node-sass

npm install sass-loader --save-dev 		//安装sass-loader

npm install style-loader --save-dev 		//安装style-loader

module: {

    rules: [{

        test: /\.vue$/,

        loader: 'vue-loader',

        options: vueLoaderConfig

      },

      {

        test: /\.js$/,

        loader: 'babel-loader',

        include: [resolve('src'), resolve('test'), resolve('node_modules/webpack-dev-server/client')]

      },

      {

        test: /\.(png|jpe?g|gif|svg)(\?.*)?$/,

        loader: 'url-loader',

        options: {

          limit: 10000,

          name: utils.assetsPath('img/[name].[hash:7].[ext]')

        }

      },

      {

        test: /\.(mp4|webm|ogg|mp3|wav|flac|aac)(\?.*)?$/,

        loader: 'url-loader',

        options: {

          limit: 10000,

          name: utils.assetsPath('media/[name].[hash:7].[ext]')

        }

      },

      {

        test: /\.(woff2?|eot|ttf|otf)(\?.*)?$/,

        loader: 'url-loader',

        options: {

          limit: 10000,

          name: utils.assetsPath('fonts/[name].[hash:7].[ext]')

        }

      },

      // 以下为新增

      {

        test: /\.scss$/,

        loaders: ["style", "css", "sass"]

      }

    ]

  },

再进行修改package.json中的  "sass-loader": "^8.0.0"

　改为7.3.1就可以了