diff --git a/.changeset/seven-foxes-read.md b/.changeset/seven-foxes-read.md
new file mode 100644
index 0000000000..24fadf62da
--- /dev/null
+++ b/.changeset/seven-foxes-read.md
@@ -0,0 +1,5 @@
+---
+"@lynx-js/react-rsbuild-plugin": patch
+---
+
+Enable CSS minification for scoped CSS.
diff --git a/packages/rspeedy/plugin-react/src/css.ts b/packages/rspeedy/plugin-react/src/css.ts
index 0b3c055a22..ee37380d3b 100644
--- a/packages/rspeedy/plugin-react/src/css.ts
+++ b/packages/rspeedy/plugin-react/src/css.ts
@@ -151,11 +151,6 @@ export function applyCSS(
         .end()
         .end()
 
-      if (enableRemoveCSSScope !== true) {
-        // TODO: enable CSS minimizer when `LightningCssMinimizerRspackPlugin` supports custom parser options.
-        chain.optimization.minimizers.delete(CHAIN_ID.MINIMIZER.CSS)
-      }
-
       // We add `sideEffects: false` to all Scoped CSS Modules.
       // Since there is no need to emit scoped CSS when the CSS Modules is not used.
       chain
diff --git a/packages/rspeedy/plugin-react/test/css.test.ts b/packages/rspeedy/plugin-react/test/css.test.ts
index b38ff017b8..96911ab801 100644
--- a/packages/rspeedy/plugin-react/test/css.test.ts
+++ b/packages/rspeedy/plugin-react/test/css.test.ts
@@ -12,13 +12,14 @@ import type {
   PostCSSLoaderOptions,
   Rspack,
 } from '@rsbuild/core'
-import { describe, expect, test } from 'vitest'
+import { describe, expect, test, vi } from 'vitest'
 
 import {
   CssExtractRspackPlugin,
   CssExtractWebpackPlugin,
 } from '@lynx-js/css-extract-webpack-plugin'
 import { LAYERS } from '@lynx-js/react-webpack-plugin'
+import { createRspeedy } from '@lynx-js/rspeedy'
 
 import { getLoaderOptions } from './getLoaderOptions.js'
 import { pluginStubRspeedyAPI } from './stub-rspeedy-api.plugin.js'
@@ -582,4 +583,47 @@ describe('Plugins - CSS', () => {
       expect(config).not.toHaveLoader('builtin:lightningcss-loader')
     })
   })
+
+  describe('minification', () => {
+    test('default', async () => {
+      vi.stubEnv('NODE_ENV', 'production')
+      const rspeedy = await createRspeedy({
+        rspeedyConfig: {
+          plugins: [pluginReactLynx(), pluginStubRspeedyAPI()],
+        },
+      })
+
+      const [config] = await rspeedy.initConfigs()
+
+      expect(
+        config?.optimization?.minimizer?.find(minimizer =>
+          minimizer && minimizer !== '...'
+          && minimizer.constructor.name === 'CssMinimizerPlugin'
+        ),
+      ).toBeDefined()
+    })
+
+    test('with enableRemoveCSSScope: false', async () => {
+      vi.stubEnv('NODE_ENV', 'production')
+      const rspeedy = await createRspeedy({
+        rspeedyConfig: {
+          plugins: [
+            pluginReactLynx({
+              enableRemoveCSSScope: false,
+            }),
+            pluginStubRspeedyAPI(),
+          ],
+        },
+      })
+
+      const [config] = await rspeedy.initConfigs()
+
+      expect(
+        config?.optimization?.minimizer?.find(minimizer =>
+          minimizer && minimizer !== '...'
+          && minimizer.constructor.name === 'CssMinimizerPlugin'
+        ),
+      ).toBeDefined()
+    })
+  })
 })