diff --git a/packages/webpack-uni-pages-loader/lib/platforms/app-plus/index.js b/packages/webpack-uni-pages-loader/lib/platforms/app-plus/index.js
index 8bb10632448f0aef14a437e07cd15f65dc5669ec..b048939ad23330dbceee0b30d5dc444f6d1d5dec 100644
--- a/packages/webpack-uni-pages-loader/lib/platforms/app-plus/index.js
+++ b/packages/webpack-uni-pages-loader/lib/platforms/app-plus/index.js
@@ -64,6 +64,8 @@ module.exports = function (pagesJson, userManifestJson) {
     navigationBarTextStyle = 'white',
     navigationBarBackgroundColor = '#000000'
   } = appJson['window'] || {}
+  
+  const TABBAR_HEIGHT = 56
 
   let manifestJson = JSON.parse(fs.readFileSync(path.resolve(__dirname, './manifest.json'), 'utf8'))
 
@@ -364,7 +366,7 @@ module.exports = function (pagesJson, userManifestJson) {
       // 纯 nvue 带 tab
       if (pagesJson.tabBar && pagesJson.tabBar.list && pagesJson.tabBar.list.length) {
         const tabBar = manifestJson.plus.tabBar = Object.assign({}, pagesJson.tabBar)
-        tabBar.height = '56px'
+        tabBar.height = `${parseFloat(tabBar.height) || TABBAR_HEIGHT}px`
         // 首页是 tabBar 页面
         const item = tabBar.list.find(page => page.pagePath === appJson.pages[0])
         if (item) {
@@ -374,7 +376,7 @@ module.exports = function (pagesJson, userManifestJson) {
       }
     } else if (pagesJson.tabBar && pagesJson.tabBar.list && pagesJson.tabBar.list.length) {
       const tabBar = manifestJson.plus.tabBar = Object.assign({}, pagesJson.tabBar)
-      tabBar.height = '56px'
+      tabBar.height = `${parseFloat(tabBar.height) || TABBAR_HEIGHT}px`
       if (isNVueEntryPage) {
         manifestJson.plus.launchwebview.id = '2'
       } else {
diff --git a/src/platforms/app-plus/service/api/device/system.js b/src/platforms/app-plus/service/api/device/system.js
index 7c90cc0ad0026ac1f689f535307ec13826234228..ec38d1b84df723713a84bf9fcf18ff9ace9f44c3 100644
--- a/src/platforms/app-plus/service/api/device/system.js
+++ b/src/platforms/app-plus/service/api/device/system.js
@@ -5,7 +5,6 @@ import {
 } from '../util'
 
 import {
-  TABBAR_HEIGHT,
   TITLEBAR_HEIGHT
 } from '../../constants'
 
@@ -50,7 +49,7 @@ export function getSystemInfo () {
     safeAreaInsets = ios ? plus.navigator.getSafeAreaInsets() : getSafeAreaInsets()
   }
   var windowHeight = Math.min(screenHeight - (titleNView ? (statusBarHeight + TITLEBAR_HEIGHT)
-    : 0) - (isTabBarPage() && tabBar.visible ? TABBAR_HEIGHT : 0), screenHeight)
+    : 0) - (isTabBarPage() && tabBar.visible ? tabBar.height : 0), screenHeight)
   var windowWidth = screenWidth
   var safeArea = {
     left: safeAreaInsets.left,
diff --git a/src/platforms/app-plus/service/constants.js b/src/platforms/app-plus/service/constants.js
index 185b5a466796257adbae54eea2d3deedbda2998b..9e97bd5772be456650086025e9bd959e3cc1cebd 100644
--- a/src/platforms/app-plus/service/constants.js
+++ b/src/platforms/app-plus/service/constants.js
@@ -1,5 +1,4 @@
 export const ANI_SHOW = 'pop-in'
 export const ANI_DURATION = 300
 
-export const TABBAR_HEIGHT = 56
-export const TITLEBAR_HEIGHT = 44
+export const TITLEBAR_HEIGHT = 44
diff --git a/src/platforms/app-plus/service/framework/tab-bar.js b/src/platforms/app-plus/service/framework/tab-bar.js
index 3c8463bb254ac522e99a1c1269f325605cc33c59..2ef4f351064c9743b3aacdf7d4594051cdf7cac1 100644
--- a/src/platforms/app-plus/service/framework/tab-bar.js
+++ b/src/platforms/app-plus/service/framework/tab-bar.js
@@ -6,6 +6,8 @@ import {
   requireNativePlugin
 } from '../bridge'
 
+const TABBAR_HEIGHT = 56
+
 let config
 
 /**
@@ -137,5 +139,8 @@ export default {
   },
   get visible () {
     return visible
+  },
+  get height () {
+    return config && config.height ? parseFloat(config.height) : TABBAR_HEIGHT
   }
 }