diff --git a/docs/guide/css.md b/docs/guide/css.md
index 75bfb199dd..aac1986dbf 100644
--- a/docs/guide/css.md
+++ b/docs/guide/css.md
@@ -133,8 +133,9 @@ module.exports = {
       // pass options to sass-loader
       // @/ is an alias to src/
       // so this assumes you have a file named `src/variables.sass`
+      // Note: this option is named as "data" in sass-loader v7
       sass: {
-        data: `@import "~@/variables.sass"`
+        prependData: `@import "~@/variables.sass"`
       },
       // by default the `sass` option will apply to both syntaxes
       // because `scss` syntax is also processed by sass-loader underlyingly
@@ -142,7 +143,7 @@ module.exports = {
       // `scss` syntax requires an semicolon at the end of a statement, while `sass` syntax requires none
       // in that case, we can target the `scss` syntax separately using the `scss` option
       scss: {
-        data: `@import "~@/variables.scss";`
+        prependData: `@import "~@/variables.scss";`
       },
       // pass Less.js Options to less-loader
       less:{
diff --git a/docs/zh/guide/css.md b/docs/zh/guide/css.md
index 2758e6c0bc..1c43282863 100644
--- a/docs/zh/guide/css.md
+++ b/docs/zh/guide/css.md
@@ -121,7 +121,8 @@ module.exports = {
       sass: {
         // @/ 是 src/ 的别名
         // 所以这里假设你有 `src/variables.sass` 这个文件
-        data: `@import "~@/variables.sass"`
+        // 注意：在 sass-loader v7 中，这个选项名是 "data"
+        prependData: `@import "~@/variables.sass"`
       },
       // 默认情况下 `sass` 选项会同时对 `sass` 和 `scss` 语法同时生效
       // 因为 `scss` 语法在内部也是由 sass-loader 处理的
@@ -129,7 +130,7 @@ module.exports = {
       // `scss` 语法会要求语句结尾必须有分号，`sass` 则要求必须没有分号
       // 在这种情况下，我们可以使用 `scss` 选项，对 `scss` 语法进行单独配置
       scss: {
-        data: `@import "~@/variables.scss";`
+        prependData: `@import "~@/variables.scss";`
       },
       // 给 less-loader 传递 Less.js 相关选项
       less:{
diff --git a/packages/@vue/cli-service/__tests__/css.spec.js b/packages/@vue/cli-service/__tests__/css.spec.js
index 7d6d6a6e36..5a6f989308 100644
--- a/packages/@vue/cli-service/__tests__/css.spec.js
+++ b/packages/@vue/cli-service/__tests__/css.spec.js
@@ -67,7 +67,12 @@ test('default loaders', () => {
     })
   })
   // sass indented syntax
-  expect(findOptions(config, 'sass', 'sass')).toMatchObject({ indentedSyntax: true, sourceMap: false })
+  expect(findOptions(config, 'sass', 'sass')).toMatchObject({
+    sassOptions: {
+      indentedSyntax: true
+    },
+    sourceMap: false
+  })
 })
 
 test('production defaults', () => {
@@ -296,21 +301,30 @@ test('css-loader options', () => {
 })
 
 test('css.loaderOptions', () => {
-  const data = '$env: production;'
+  const prependData = '$env: production;'
   const config = genConfig({
     vue: {
       css: {
         loaderOptions: {
           sass: {
-            data
+            prependData
           }
         }
       }
     }
   })
 
-  expect(findOptions(config, 'scss', 'sass')).toMatchObject({ data, sourceMap: false })
-  expect(findOptions(config, 'sass', 'sass')).toMatchObject({ data, indentedSyntax: true, sourceMap: false })
+  expect(findOptions(config, 'scss', 'sass')).toMatchObject({
+    prependData,
+    sourceMap: false
+  })
+  expect(findOptions(config, 'sass', 'sass')).toMatchObject({
+    prependData,
+    sassOptions: {
+      indentedSyntax: true
+    },
+    sourceMap: false
+  })
 })
 
 test('scss loaderOptions', () => {
@@ -322,24 +336,33 @@ test('scss loaderOptions', () => {
       css: {
         loaderOptions: {
           sass: {
-            sassData
+            prependData: sassData
           },
           scss: {
-            scssData
+            prependData: scssData
           }
         }
       }
     }
   })
 
-  expect(findOptions(config, 'scss', 'sass')).toMatchObject({ scssData, sourceMap: false })
-  expect(findOptions(config, 'sass', 'sass')).toMatchObject({ sassData, indentedSyntax: true, sourceMap: false })
+  expect(findOptions(config, 'scss', 'sass')).toMatchObject({
+    prependData: scssData,
+    sourceMap: false
+  })
+  expect(findOptions(config, 'sass', 'sass')).toMatchObject({
+    prependData: sassData,
+    sassOptions: {
+      indentedSyntax: true
+    },
+    sourceMap: false
+  })
 })
 
 test('should use dart sass implementation whenever possible', () => {
   const config = genConfig()
-  expect(findOptions(config, 'scss', 'sass')).toMatchObject({ fiber: require('fibers'), implementation: require('sass') })
-  expect(findOptions(config, 'sass', 'sass')).toMatchObject({ fiber: require('fibers'), implementation: require('sass') })
+  expect(findOptions(config, 'scss', 'sass')).toMatchObject({ implementation: require('sass') })
+  expect(findOptions(config, 'sass', 'sass')).toMatchObject({ implementation: require('sass') })
 })
 
 test('skip postcss-loader if no postcss config found', () => {
diff --git a/packages/@vue/cli-service/generator/index.js b/packages/@vue/cli-service/generator/index.js
index 197416e01c..f169395b81 100644
--- a/packages/@vue/cli-service/generator/index.js
+++ b/packages/@vue/cli-service/generator/index.js
@@ -29,15 +29,15 @@ module.exports = (api, options) => {
     const deps = {
       sass: {
         sass: '^1.19.0',
-        'sass-loader': '^7.1.0'
+        'sass-loader': '^8.0.0'
       },
       'node-sass': {
         'node-sass': '^4.12.0',
-        'sass-loader': '^7.1.0'
+        'sass-loader': '^8.0.0'
       },
       'dart-sass': {
         sass: '^1.19.0',
-        'sass-loader': '^7.1.0'
+        'sass-loader': '^8.0.0'
       },
       less: {
         'less': '^3.0.4',
diff --git a/packages/@vue/cli-service/lib/config/css.js b/packages/@vue/cli-service/lib/config/css.js
index 2133924be4..3265fa36bf 100644
--- a/packages/@vue/cli-service/lib/config/css.js
+++ b/packages/@vue/cli-service/lib/config/css.js
@@ -1,5 +1,7 @@
 const fs = require('fs')
 const path = require('path')
+const semver = require('semver')
+const { warn, pauseSpinner, resumeSpinner } = require('@vue/cli-shared-utils')
 
 const findExisting = (context, files) => {
   for (const file of files) {
@@ -15,10 +17,23 @@ module.exports = (api, rootOptions) => {
     const shadowMode = !!process.env.VUE_CLI_CSS_SHADOW_MODE
     const isProd = process.env.NODE_ENV === 'production'
 
+    let sassLoaderVersion
+    try {
+      sassLoaderVersion = semver.major(require('sass-loader/package.json').version)
+    } catch (e) {}
+    if (sassLoaderVersion < 8) {
+      pauseSpinner()
+      warn('A new version of sass-loader is available. Please upgrade for best experience.')
+      resumeSpinner()
+    }
+
     const defaultSassLoaderOptions = {}
     try {
       defaultSassLoaderOptions.implementation = require('sass')
-      defaultSassLoaderOptions.fiber = require('fibers')
+      // since sass-loader 8, fibers will be automatically detected and used
+      if (sassLoaderVersion < 8) {
+        defaultSassLoaderOptions.fiber = require('fibers')
+      }
     } catch (e) {}
 
     const {
@@ -175,13 +190,28 @@ module.exports = (api, rootOptions) => {
       defaultSassLoaderOptions,
       loaderOptions.scss || loaderOptions.sass
     ))
-    createCSSRule('sass', /\.sass$/, 'sass-loader', Object.assign(
-      defaultSassLoaderOptions,
-      {
-        indentedSyntax: true
-      },
-      loaderOptions.sass
-    ))
+    if (sassLoaderVersion < 8) {
+      createCSSRule('sass', /\.sass$/, 'sass-loader', Object.assign(
+        defaultSassLoaderOptions,
+        {
+          indentedSyntax: true
+        },
+        loaderOptions.sass
+      ))
+    } else {
+      createCSSRule('sass', /\.sass$/, 'sass-loader', Object.assign(
+        defaultSassLoaderOptions,
+        loaderOptions.sass,
+        {
+          sassOptions: Object.assign(
+            (loaderOptions.sass && loaderOptions.sass.sassOptions) || {},
+            {
+              indentedSyntax: true
+            }
+          )
+        }
+      ))
+    }
     createCSSRule('less', /\.less$/, 'less-loader', loaderOptions.less)
     createCSSRule('stylus', /\.styl(us)?$/, 'stylus-loader', Object.assign({
       preferPathResolver: 'webpack'
diff --git a/packages/@vue/cli-service/package.json b/packages/@vue/cli-service/package.json
index a66bf68e89..b5edf63e11 100644
--- a/packages/@vue/cli-service/package.json
+++ b/packages/@vue/cli-service/package.json
@@ -85,7 +85,7 @@
   "devDependencies": {
     "fibers": ">= 3.1.1 <5.0.0",
     "sass": "^1.19.0",
-    "sass-loader": "^7.1.0",
+    "sass-loader": "^8.0.0",
     "vue": "^2.6.10",
     "vue-router": "^3.0.6",
     "vue-template-compiler": "^2.6.10",
diff --git a/packages/@vue/cli-shared-utils/lib/spinner.js b/packages/@vue/cli-shared-utils/lib/spinner.js
index 84f44d677e..b8e5abdd0d 100644
--- a/packages/@vue/cli-shared-utils/lib/spinner.js
+++ b/packages/@vue/cli-shared-utils/lib/spinner.js
@@ -3,6 +3,7 @@ const chalk = require('chalk')
 
 const spinner = ora()
 let lastMsg = null
+let isPaused = false
 
 exports.logWithSpinner = (symbol, msg) => {
   if (!msg) {
@@ -36,11 +37,17 @@ exports.stopSpinner = (persist) => {
 }
 
 exports.pauseSpinner = () => {
-  spinner.stop()
+  if (spinner.isSpinning) {
+    spinner.stop()
+    isPaused = true
+  }
 }
 
 exports.resumeSpinner = () => {
-  spinner.start()
+  if (isPaused) {
+    spinner.start()
+    isPaused = false
+  }
 }
 
 exports.failSpinner = (text) => {
diff --git a/yarn.lock b/yarn.lock
index 5ca04fcd9e..d6a8724561 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -4650,15 +4650,14 @@ cliui@^5.0.0:
     strip-ansi "^5.2.0"
     wrap-ansi "^5.1.0"
 
-clone-deep@^2.0.1:
-  version "2.0.2"
-  resolved "https://registry.yarnpkg.com/clone-deep/-/clone-deep-2.0.2.tgz#00db3a1e173656730d1188c3d6aced6d7ea97713"
-  integrity sha512-SZegPTKjCgpQH63E+eN6mVEEPdQBOUzjyJm5Pora4lrwWRFS8I0QAxV/KD6vV/i0WuijHZWQC1fMsPEdxfdVCQ==
+clone-deep@^4.0.1:
+  version "4.0.1"
+  resolved "https://registry.yarnpkg.com/clone-deep/-/clone-deep-4.0.1.tgz#c19fd9bdbbf85942b4fd979c84dcf7d5f07c2387"
+  integrity sha512-neHB9xuzh/wk0dIHweyAXv2aPGZIVk3pLMe+/RNzINf17fe0OG96QroktYAUm7SM1PBnzTabaLboqqxDyMU+SQ==
   dependencies:
-    for-own "^1.0.0"
     is-plain-object "^2.0.4"
-    kind-of "^6.0.0"
-    shallow-clone "^1.0.0"
+    kind-of "^6.0.2"
+    shallow-clone "^3.0.0"
 
 clone@2.x, clone@^2.1.1:
   version "2.1.2"
@@ -7375,23 +7374,11 @@ follow-redirects@^1.0.0:
   dependencies:
     debug "^3.2.6"
 
-for-in@^0.1.3:
-  version "0.1.8"
-  resolved "https://registry.yarnpkg.com/for-in/-/for-in-0.1.8.tgz#d8773908e31256109952b1fdb9b3fa867d2775e1"
-  integrity sha1-2Hc5COMSVhCZUrH9ubP6hn0ndeE=
-
-for-in@^1.0.1, for-in@^1.0.2:
+for-in@^1.0.2:
   version "1.0.2"
   resolved "https://registry.yarnpkg.com/for-in/-/for-in-1.0.2.tgz#81068d295a8142ec0ac726c6e2200c30fb6d5e80"
   integrity sha1-gQaNKVqBQuwKxybG4iAMMPttXoA=
 
-for-own@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/for-own/-/for-own-1.0.0.tgz#c63332f415cedc4b04dbfe70cf836494c53cb44b"
-  integrity sha1-xjMy9BXO3EsE2/5wz4NklMU8tEs=
-  dependencies:
-    for-in "^1.0.1"
-
 foreach@^2.0.5:
   version "2.0.5"
   resolved "https://registry.yarnpkg.com/foreach/-/foreach-2.0.5.tgz#0bee005018aeb260d0a3af3ae658dd0136ec1b99"
@@ -10265,7 +10252,7 @@ loader-utils@^0.2.16:
     json5 "^0.5.0"
     object-assign "^4.0.1"
 
-loader-utils@^1.0.1, loader-utils@^1.0.2, loader-utils@^1.1.0, loader-utils@^1.2.3:
+loader-utils@^1.0.2, loader-utils@^1.1.0, loader-utils@^1.2.3:
   version "1.2.3"
   resolved "https://registry.yarnpkg.com/loader-utils/-/loader-utils-1.2.3.tgz#1ff5dc6911c9f0a062531a4c04b609406108c2c7"
   integrity sha512-fkpz8ejdnEMG3s37wGL07iSBDg99O9D5yflE9RGNH3hRdx9SOwYfnGYdZOUIZitN8E+E2vkq3MUMYMvPYl5ZZA==
@@ -10455,11 +10442,6 @@ lodash.sortby@^4.7.0:
   resolved "https://registry.yarnpkg.com/lodash.sortby/-/lodash.sortby-4.7.0.tgz#edd14c824e2cc9c1e0b0a1b42bb5210516a42438"
   integrity sha1-7dFMgk4sycHgsKG0K7UhBRakJDg=
 
-lodash.tail@^4.1.1:
-  version "4.1.1"
-  resolved "https://registry.yarnpkg.com/lodash.tail/-/lodash.tail-4.1.1.tgz#d2333a36d9e7717c8ad2f7cacafec7c32b444664"
-  integrity sha1-0jM6NtnncXyK0vfKyv7HwytERmQ=
-
 lodash.template@^4.0.2, lodash.template@^4.4.0, lodash.template@^4.5.0:
   version "4.5.0"
   resolved "https://registry.yarnpkg.com/lodash.template/-/lodash.template-4.5.0.tgz#f976195cf3f347d0d5f52483569fe8031ccce8ab"
@@ -11112,14 +11094,6 @@ mixin-deep@^1.2.0:
     for-in "^1.0.2"
     is-extendable "^1.0.1"
 
-mixin-object@^2.0.1:
-  version "2.0.1"
-  resolved "https://registry.yarnpkg.com/mixin-object/-/mixin-object-2.0.1.tgz#4fb949441dab182540f1fe035ba60e1947a5e57e"
-  integrity sha1-T7lJRB2rGCVA8f4DW6YOGUel5X4=
-  dependencies:
-    for-in "^0.1.3"
-    is-extendable "^0.1.1"
-
 mkdirp-promise@^5.0.1:
   version "5.0.1"
   resolved "https://registry.yarnpkg.com/mkdirp-promise/-/mkdirp-promise-5.0.1.tgz#e9b8f68e552c68a9c1713b84883f7a1dd039b8a1"
@@ -13243,7 +13217,7 @@ punycode@^2.1.0, punycode@^2.1.1:
   resolved "https://registry.yarnpkg.com/punycode/-/punycode-2.1.1.tgz#b58b010ac40c22c5657616c8d2c2c02c7bf479ec"
   integrity sha512-XRsRjdf+j5ml+y/6GKHPZbrF/8p2Yga0JPtdqTIY2Xe5ohJPD9saDJJLPvp9+NSBprVvevdXZybnj2cv8OEd0A==
 
-puppeteer@1.11.0, puppeteer@^1.11.0:
+puppeteer@^1.11.0:
   version "1.11.0"
   resolved "https://registry.yarnpkg.com/puppeteer/-/puppeteer-1.11.0.tgz#63cdbe12b07275cd6e0b94bce41f3fcb20305770"
   integrity sha512-iG4iMOHixc2EpzqRV+pv7o3GgmU2dNYEMkvKwSaQO/vMZURakwSOn/EYJ6OIRFYOque1qorzIBvrytPIQB3YzQ==
@@ -13996,17 +13970,16 @@ sane@^4.0.3:
     minimist "^1.1.1"
     walker "~1.0.5"
 
-sass-loader@^7.1.0:
-  version "7.1.0"
-  resolved "https://registry.yarnpkg.com/sass-loader/-/sass-loader-7.1.0.tgz#16fd5138cb8b424bf8a759528a1972d72aad069d"
-  integrity sha512-+G+BKGglmZM2GUSfT9TLuEp6tzehHPjAMoRRItOojWIqIGPloVCMhNIQuG639eJ+y033PaGTSjLaTHts8Kw79w==
+sass-loader@^8.0.0:
+  version "8.0.0"
+  resolved "https://registry.yarnpkg.com/sass-loader/-/sass-loader-8.0.0.tgz#e7b07a3e357f965e6b03dd45b016b0a9746af797"
+  integrity sha512-+qeMu563PN7rPdit2+n5uuYVR0SSVwm0JsOUsaJXzgYcClWSlmX0iHDnmeOobPkf5kUglVot3QS6SyLyaQoJ4w==
   dependencies:
-    clone-deep "^2.0.1"
-    loader-utils "^1.0.1"
-    lodash.tail "^4.1.1"
-    neo-async "^2.5.0"
-    pify "^3.0.0"
-    semver "^5.5.0"
+    clone-deep "^4.0.1"
+    loader-utils "^1.2.3"
+    neo-async "^2.6.1"
+    schema-utils "^2.1.0"
+    semver "^6.3.0"
 
 sass@^1.19.0:
   version "1.22.9"
@@ -14049,6 +14022,14 @@ schema-utils@^2.0.0:
     ajv "^6.1.0"
     ajv-keywords "^3.1.0"
 
+schema-utils@^2.1.0:
+  version "2.2.0"
+  resolved "https://registry.yarnpkg.com/schema-utils/-/schema-utils-2.2.0.tgz#48a065ce219e0cacf4631473159037b2c1ae82da"
+  integrity sha512-5EwsCNhfFTZvUreQhx/4vVQpJ/lnCAkgoIHLhSpp4ZirE+4hzFvdJi0FMub6hxbFVBJYSpeVVmon+2e7uEGRrA==
+  dependencies:
+    ajv "^6.10.2"
+    ajv-keywords "^3.4.1"
+
 scrollparent@^2.0.1:
   version "2.0.1"
   resolved "https://registry.yarnpkg.com/scrollparent/-/scrollparent-2.0.1.tgz#715d5b9cc57760fb22bdccc3befb5bfe06b1a317"
@@ -14118,7 +14099,7 @@ semver@5.5.0:
   resolved "https://registry.yarnpkg.com/semver/-/semver-5.5.0.tgz#dc4bbc7a6ca9d916dee5d43516f0092b58f7b8ab"
   integrity sha512-4SJ3dm0WAwWy/NVeioZh5AntkdJoWKxHxcmyP622fOkgHa4z3R0TdBJICINyaSDE6uNwVc8gZr+ZinwZAH4xIA==
 
-semver@^6.0.0, semver@^6.1.0, semver@^6.1.1, semver@^6.2.0:
+semver@^6.0.0, semver@^6.1.0, semver@^6.1.1, semver@^6.2.0, semver@^6.3.0:
   version "6.3.0"
   resolved "https://registry.yarnpkg.com/semver/-/semver-6.3.0.tgz#ee0a64c8af5e8ceea67687b133761e1becbd1d3d"
   integrity sha512-b39TBaTSfV6yBrapU89p5fKekE2m/NwnDocOVruQFS1/veMgdzuPcnOM34M6CwxW8jH/lxEa5rBoDeUwu5HHTw==
@@ -14232,14 +14213,12 @@ sha.js@^2.4.0, sha.js@^2.4.11, sha.js@^2.4.8:
     inherits "^2.0.1"
     safe-buffer "^5.0.1"
 
-shallow-clone@^1.0.0:
-  version "1.0.0"
-  resolved "https://registry.yarnpkg.com/shallow-clone/-/shallow-clone-1.0.0.tgz#4480cd06e882ef68b2ad88a3ea54832e2c48b571"
-  integrity sha512-oeXreoKR/SyNJtRJMAKPDSvd28OqEwG4eR/xc856cRGBII7gX9lvAqDxusPm0846z/w/hWYjI1NpKwJ00NHzRA==
+shallow-clone@^3.0.0:
+  version "3.0.1"
+  resolved "https://registry.yarnpkg.com/shallow-clone/-/shallow-clone-3.0.1.tgz#8f2981ad92531f55035b01fb230769a40e02efa3"
+  integrity sha512-/6KqX+GVUdqPuPPd2LxDDxzX6CAbjJehAAOKlNpqqUpAqPM6HeL8f+o3a+JsyGjn2lv0WY8UsTgUJjU9Ok55NA==
   dependencies:
-    is-extendable "^0.1.1"
-    kind-of "^5.0.0"
-    mixin-object "^2.0.1"
+    kind-of "^6.0.2"
 
 shebang-command@^1.2.0:
   version "1.2.0"