diff --git a/packages/vant-cli/src/commands/dev.ts b/packages/vant-cli/src/commands/dev.ts
index b9699575f..e252d5ac9 100644
--- a/packages/vant-cli/src/commands/dev.ts
+++ b/packages/vant-cli/src/commands/dev.ts
@@ -6,6 +6,7 @@ import { siteDevConfig } from '../config/webpack.site.dev';
 import { genPackageEntry } from '../compiler/gen-package-entry';
 import { genMobileEntry } from '../compiler/gen-mobile-entry';
 import { genDesktopEntry } from '../compiler/gen-desktop-entry';
+import { genStyleDepsMap } from '../compiler/gen-style-deps-map';
 
 function runWebpack() {
   const server = new WebpackDevServer(
@@ -34,6 +35,7 @@ function runWebpack() {
 
 export function dev() {
   clean();
+  genStyleDepsMap();
   genPackageEntry();
   genMobileEntry();
   genDesktopEntry();
diff --git a/packages/vant-cli/src/common/constant.ts b/packages/vant-cli/src/common/constant.ts
index b969a4f73..c683ef21e 100644
--- a/packages/vant-cli/src/common/constant.ts
+++ b/packages/vant-cli/src/common/constant.ts
@@ -15,6 +15,7 @@ export const CONFIG_DIR = join(__dirname, '../config');
 export const PACKAGE_ENTRY_FILE = join(DIST_DIR, 'package-entry.js');
 export const MOBILE_ENTRY_FILE = join(DIST_DIR, 'mobile-entry.js');
 export const DESKTOP_ENTRY_FILE = join(DIST_DIR, 'desktop-entry.js');
+export const STYPE_DEPS_MAP_FILE = join(DIST_DIR, 'style-deps-map.json');
 
 export const JEST_CONFIG_FILE = join(CONFIG_DIR, 'jest.config.js');
 export const BABEL_CONFIG_FILE = join(CONFIG_DIR, 'babel.config.js');
diff --git a/packages/vant-cli/src/compiler/gen-style-deps-map.ts b/packages/vant-cli/src/compiler/gen-style-deps-map.ts
new file mode 100644
index 000000000..436471d6e
--- /dev/null
+++ b/packages/vant-cli/src/compiler/gen-style-deps-map.ts
@@ -0,0 +1,96 @@
+/**
+ * Build style entry of all components
+ */
+
+import { join } from 'path';
+import { existsSync, writeFileSync } from 'fs-extra';
+import { getComponents } from '../common';
+import { ES_DIR, STYPE_DEPS_MAP_FILE } from '../common/constant';
+import dependencyTree from 'dependency-tree';
+
+interface DependencyObj {
+  [k: string]: DependencyObj;
+}
+
+const components = getComponents();
+const STYLE_EXTS = ['.css', '.less', '.scss'];
+const JS_EXTS = ['.js', '.jsx', '.ts', '.tsx', '.vue'];
+
+function getStylePath(component: string, ext = '.css'): string {
+  return join(ES_DIR, `${component}/index${ext}`);
+}
+
+function checkStyleExists(component: string): boolean {
+  return STYLE_EXTS.some(ext => existsSync(getStylePath(component, ext)));
+}
+
+function getScriptPath(component: string): string {
+  for (let i = 0; i < JS_EXTS.length; i++) {
+    const path = join(ES_DIR, component, `index${JS_EXTS[i]}`);
+    if (existsSync(path)) {
+      return path;
+    }
+  }
+
+  return '';
+}
+
+function matchPath(path: string, component: string): boolean {
+  return path
+    .replace(ES_DIR, '')
+    .split('/')
+    .includes(component);
+}
+
+function search(tree: DependencyObj, component: string, checkList: string[]) {
+  Object.keys(tree).forEach(key => {
+    search(tree[key], component, checkList);
+    components
+      .filter(item => matchPath(key, item))
+      .forEach(item => {
+        if (!checkList.includes(item) && item !== component) {
+          checkList.push(item);
+        }
+      });
+  });
+}
+
+// analyze component dependencies
+function analyzeDeps(component: string) {
+  const checkList: string[] = [];
+  const filename = getScriptPath(component);
+
+  if (!filename) {
+    return [];
+  }
+
+  search(
+    dependencyTree({
+      filename,
+      directory: ES_DIR,
+      filter: path => !~path.indexOf('node_modules'),
+      detective: {
+        es6: {
+          mixedImports: true
+        }
+      }
+    }),
+    component,
+    checkList
+  );
+
+  checkList.push(component);
+
+  return checkList.filter(checkStyleExists);
+}
+
+export function genStyleDepsMap() {
+  const map = components.reduce((map, component) => {
+    map[component] = analyzeDeps(component);
+    return map;
+  }, {} as Record<string, string[]>);
+
+  const content = JSON.stringify(map, null, 2);
+
+  writeFileSync(STYPE_DEPS_MAP_FILE, content);
+}