npm i @nuxtjs/proxy --save

  /*
  ** Nuxt.js modules
  */
  modules: [
    '@nuxtjs/axios',
    '@nuxtjs/proxy'
  ],

  axios: {
    proxy: true
  }

  proxy: {
    '/api': {
      target: 'http://xxxxx', //代理的地址
      changeOrigin: true
    }
  }