diff --git a/packages/vant-cli/src/config/vite.site.ts b/packages/vant-cli/src/config/vite.site.ts
index 2abb1f7be..697306100 100644
--- a/packages/vant-cli/src/config/vite.site.ts
+++ b/packages/vant-cli/src/config/vite.site.ts
@@ -141,6 +141,8 @@ export function getViteConfigForSiteProd(): InlineConfig {
       outDir,
       brotliSize: false,
       emptyOutDir: true,
+      // reduce small CSS files
+      cssCodeSplit: false,
       rollupOptions: {
         input: {
           main: join(SITE_SRC_DIR, 'index.html'),