diff --git a/docusaurus.config.js b/docusaurus.config.js
index 5f52f3d2..d523f3e9 100644
--- a/docusaurus.config.js
+++ b/docusaurus.config.js
@@ -163,7 +163,10 @@ const config = {
             label: '市场',
             position: 'left',
           },
-
+          {
+            type: 'search',
+            position: 'right',
+          },
           {
             type: 'localeDropdown',
             position: 'right',
@@ -180,6 +183,33 @@ const config = {
         darkTheme: darkCodeTheme,
         additionalLanguages: ['shell-session', 'http', 'protobuf', 'rust'],
       },
+      algolia: {
+        // The application ID provided by Algolia
+        appId: 'E5GVH515OK',
+
+        // Public API key: it is safe to commit it
+        apiKey: '06b2d0933abc228a5979d16d1af26c0b',
+
+        // 默认 index 是简体中文，其它语言需要动态切 indexName，逻辑在 SearchBar.tsx
+        indexName: 'open-longportapp',
+
+        // Optional: see doc section below
+        contextualSearch: true,
+
+        // Optional: Replace parts of the item URLs from Algolia. Useful when using the same search index for multiple deployments using a different baseUrl. You can use regexp or string in the `from` param. For example: localhost:3000 vs myCompany.com/docs
+        // replaceSearchResultPathname: {
+        //   from: '/docs/', // or as RegExp: /\/docs\//
+        //   to: '/',
+        // },
+
+        // Optional: Algolia search parameters
+        searchParameters: {},
+
+        // Optional: path for search page that enabled by default (`false` to disable it)
+        searchPagePath: 'search',
+
+        //... other Algolia params
+      },
     }),
 }
 
diff --git a/src/components/dropdown/index.module.scss b/src/components/dropdown/index.module.scss
index 446fb524..011f3af0 100644
--- a/src/components/dropdown/index.module.scss
+++ b/src/components/dropdown/index.module.scss
@@ -19,7 +19,7 @@ $border-color: #eeeeee;
   --dropdown-hover-bg: #{$hover-bg};
   --dropdown-border-color: #{$border-color};
   --dropdown-brand-color: #{$brand-color};
-  @apply relative text-sm;
+  @apply relative text-sm mr-[50px] md:mr-auto;
   :global(.trigger) {
     @apply cursor-pointer py-1 px-2 rounded-full text-base font-medium;
     &:hover {
diff --git a/src/theme/SearchBar/index.js b/src/theme/SearchBar/index.js
new file mode 100644
index 00000000..7bad58e7
--- /dev/null
+++ b/src/theme/SearchBar/index.js
@@ -0,0 +1,192 @@
+import React, { useCallback, useMemo, useRef, useState } from 'react'
+import { DocSearchButton, useDocSearchKeyboardEvents } from '@docsearch/react'
+import Head from '@docusaurus/Head'
+import Link from '@docusaurus/Link'
+import { useHistory } from '@docusaurus/router'
+import { isRegexpStringMatch, useSearchLinkCreator } from '@docusaurus/theme-common'
+import { useAlgoliaContextualFacetFilters, useSearchResultUrlProcessor } from '@docusaurus/theme-search-algolia/client'
+import Translate from '@docusaurus/Translate'
+import useDocusaurusContext from '@docusaurus/useDocusaurusContext'
+import { createPortal } from 'react-dom'
+import translations from '@theme/SearchTranslations'
+
+let DocSearchModal = null
+
+function Hit({ hit, children }) {
+  return <Link to={hit.url}>{children}</Link>
+}
+
+function ResultsFooter({ state, onClose }) {
+  const createSearchLink = useSearchLinkCreator()
+  return (
+    <Link to={createSearchLink(state.query)} onClick={onClose}>
+      <Translate id="theme.SearchBar.seeAll" values={{ count: state.context.nbHits }}>
+        {'See all {count} results'}
+      </Translate>
+    </Link>
+  )
+}
+
+function mergeFacetFilters(f1, f2) {
+  const normalize = (f) => (typeof f === 'string' ? [f] : f)
+  return [...normalize(f1), ...normalize(f2)]
+}
+
+function DocSearch({ contextualSearch, externalUrlRegex, ...props }) {
+  const { siteMetadata, i18n } = useDocusaurusContext()
+  const processSearchResultUrl = useSearchResultUrlProcessor()
+  const contextualSearchFacetFilters = useAlgoliaContextualFacetFilters()
+  const configFacetFilters = props.searchParameters?.facetFilters ?? []
+  const facetFilters = contextualSearch
+    ? // Merge contextual search filters with config filters
+      mergeFacetFilters(contextualSearchFacetFilters, configFacetFilters)
+    : // ... or use config facetFilters
+      configFacetFilters
+  // We let user override default searchParameters if she wants to
+  const searchParameters = {
+    ...props.searchParameters,
+    facetFilters,
+  }
+  const history = useHistory()
+  const searchContainer = useRef(null)
+  const searchButtonRef = useRef(null)
+  const [isOpen, setIsOpen] = useState(false)
+  const [initialQuery, setInitialQuery] = useState(undefined)
+  const importDocSearchModalIfNeeded = useCallback(() => {
+    if (DocSearchModal) {
+      return Promise.resolve()
+    }
+    return Promise.all([
+      import('@docsearch/react/modal'),
+      import('@docsearch/react/style'),
+      import('./styles.css'),
+    ]).then(([{ DocSearchModal: Modal }]) => {
+      DocSearchModal = Modal
+    })
+  }, [])
+  const onOpen = useCallback(() => {
+    importDocSearchModalIfNeeded().then(() => {
+      searchContainer.current = document.createElement('div')
+      document.body.insertBefore(searchContainer.current, document.body.firstChild)
+      setIsOpen(true)
+    })
+  }, [importDocSearchModalIfNeeded, setIsOpen])
+  const onClose = useCallback(() => {
+    setIsOpen(false)
+    searchContainer.current?.remove()
+  }, [setIsOpen])
+  const onInput = useCallback(
+    (event) => {
+      importDocSearchModalIfNeeded().then(() => {
+        setIsOpen(true)
+        setInitialQuery(event.key)
+      })
+    },
+    [importDocSearchModalIfNeeded, setIsOpen, setInitialQuery]
+  )
+  const navigator = useRef({
+    navigate({ itemUrl }) {
+      // Algolia results could contain URL's from other domains which cannot
+      // be served through history and should navigate with window.location
+      if (isRegexpStringMatch(externalUrlRegex, itemUrl)) {
+        window.location.href = itemUrl
+      } else {
+        history.push(itemUrl)
+      }
+    },
+  }).current
+  const transformItems = useRef((items) =>
+    props.transformItems
+      ? // Custom transformItems
+        props.transformItems(items)
+      : // Default transformItems
+        items.map((item) => ({
+          ...item,
+          url: processSearchResultUrl(item.url),
+        }))
+  ).current
+  const resultsFooterComponent = useMemo(
+    () =>
+      // eslint-disable-next-line react/no-unstable-nested-components
+      (footerProps) => <ResultsFooter {...footerProps} onClose={onClose} />,
+    [onClose]
+  )
+  const transformSearchClient = useCallback(
+    (searchClient) => {
+      searchClient.addAlgoliaAgent('docusaurus', siteMetadata.docusaurusVersion)
+      return searchClient
+    },
+    [siteMetadata.docusaurusVersion]
+  )
+  useDocSearchKeyboardEvents({
+    isOpen,
+    onOpen,
+    onClose,
+    onInput,
+    searchButtonRef,
+  })
+
+  const indexName = useMemo(() => {
+    switch (i18n.currentLocale) {
+      case 'en':
+        return 'open-longportapp-en'
+        break
+      case 'zh-HK':
+        return 'open-longportapp-zh-HK'
+        break
+      default:
+        return 'open-longportapp'
+    }
+  }, [i18n.currentLocale])
+
+  console.log('DocSearch-142', i18n.currentLocale, indexName)
+
+  return (
+    <>
+      <Head>
+        {/* This hints the browser that the website will load data from Algolia,
+        and allows it to preconnect to the DocSearch cluster. It makes the first
+        query faster, especially on mobile. */}
+        <link rel="preconnect" href={`https://${props.appId}-dsn.algolia.net`} crossOrigin="anonymous" />
+      </Head>
+
+      <DocSearchButton
+        onTouchStart={importDocSearchModalIfNeeded}
+        onFocus={importDocSearchModalIfNeeded}
+        onMouseOver={importDocSearchModalIfNeeded}
+        onClick={onOpen}
+        ref={searchButtonRef}
+        translations={translations.button}
+      />
+
+      {isOpen &&
+        DocSearchModal &&
+        searchContainer.current &&
+        createPortal(
+          <DocSearchModal
+            onClose={onClose}
+            initialScrollY={window.scrollY}
+            initialQuery={initialQuery}
+            navigator={navigator}
+            transformItems={transformItems}
+            hitComponent={Hit}
+            transformSearchClient={transformSearchClient}
+            {...(props.searchPagePath && {
+              resultsFooterComponent,
+            })}
+            {...props}
+            indexName={indexName}
+            searchParameters={searchParameters}
+            placeholder={translations.placeholder}
+            translations={translations.modal}
+          />,
+          searchContainer.current
+        )}
+    </>
+  )
+}
+
+export default function SearchBar() {
+  const { siteConfig } = useDocusaurusContext()
+  return <DocSearch {...siteConfig.themeConfig.algolia} />
+}
diff --git a/src/theme/SearchBar/styles.css b/src/theme/SearchBar/styles.css
new file mode 100644
index 00000000..c80dd71d
--- /dev/null
+++ b/src/theme/SearchBar/styles.css
@@ -0,0 +1,21 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ */
+
+:root {
+  --docsearch-primary-color: var(--ifm-color-primary);
+  --docsearch-text-color: var(--ifm-font-color-base);
+}
+
+.DocSearch-Button {
+  margin: 0;
+  transition: all var(--ifm-transition-fast)
+    var(--ifm-transition-timing-default);
+}
+
+.DocSearch-Container {
+  z-index: calc(var(--ifm-z-index-fixed) + 1);
+}