diff --git a/packages/engine/build.cloud.json b/packages/engine/build.cloud.json
index 772fa0a2d..60fbc52b3 100644
--- a/packages/engine/build.cloud.json
+++ b/packages/engine/build.cloud.json
@@ -23,7 +23,6 @@
   "outputDir": "dist",
   "vendor": false,
   "ignoreHtmlTemplate": true,
-  "sourceMap": true,
   "plugins": [
     "build-plugin-react-app",
     ["build-plugin-fusion", {
diff --git a/packages/engine/build.plugin.js b/packages/engine/build.plugin.js
index ba3096f14..793c62fa7 100644
--- a/packages/engine/build.plugin.js
+++ b/packages/engine/build.plugin.js
@@ -19,5 +19,6 @@ module.exports = ({ onGetWebpackConfig }) => {
       */
     config.plugins.delete('hot');
     config.devServer.hot(false);
+    config.devtool('hidden-source-map');
   });
 };
diff --git a/packages/engine/package.json b/packages/engine/package.json
index 06c82b200..7129a3c53 100644
--- a/packages/engine/package.json
+++ b/packages/engine/package.json
@@ -13,7 +13,7 @@
     "start": "build-scripts start",
     "version:update": "node ./scripts/version.js",
     "build": "build-scripts build --skip-demo",
-    "cloud-build": "build-scripts build --config build.cloud.json && tnpm run version:update && node ./scripts/add-blank-line.js",
+    "cloud-build": "build-scripts build --config build.cloud.json && tnpm run version:update",
     "test": "build-scripts test --config build.test.json"
   },
   "license": "MIT",
diff --git a/packages/engine/scripts/add-blank-line.js b/packages/engine/scripts/add-blank-line.js
deleted file mode 100644
index 11cddadf1..000000000
--- a/packages/engine/scripts/add-blank-line.js
+++ /dev/null
@@ -1,19 +0,0 @@
-/* eslint-disable @typescript-eslint/no-var-requires */
-/* eslint-disable @typescript-eslint/no-require-imports  */
-const { join } = require('path');
-const fse = require('fs-extra');
-
-
-const distDir = join(__dirname, '../dist');
-
-const distFileNames = ['engine.js', 'engine-core.js'];
-
-distFileNames.forEach(name => {
-  const distFile = join(distDir, 'js', name);
-
-  const indexContent = fse.readFileSync(distFile, 'utf-8') + '\n';
-
-  fse.writeFileSync(distFile, indexContent);
-});
-
-console.log('[engine] add a blank line successfully!');
diff --git a/packages/vision-polyfill/build.cloud.json b/packages/vision-polyfill/build.cloud.json
index 3e8dd9a02..90e74a3af 100644
--- a/packages/vision-polyfill/build.cloud.json
+++ b/packages/vision-polyfill/build.cloud.json
@@ -23,7 +23,6 @@
   "outputDir": "dist",
   "vendor": false,
   "ignoreHtmlTemplate": true,
-  "sourceMap": true,
   "plugins": [
     "build-plugin-react-app",
     ["build-plugin-fusion", {
diff --git a/packages/vision-polyfill/build.plugin.js b/packages/vision-polyfill/build.plugin.js
index ba3096f14..793c62fa7 100644
--- a/packages/vision-polyfill/build.plugin.js
+++ b/packages/vision-polyfill/build.plugin.js
@@ -19,5 +19,6 @@ module.exports = ({ onGetWebpackConfig }) => {
       */
     config.plugins.delete('hot');
     config.devServer.hot(false);
+    config.devtool('hidden-source-map');
   });
 };