diff --git a/lib/config/app_config.dart b/lib/config/app_config.dart
index 0502675..8f45ea5 100644
--- a/lib/config/app_config.dart
+++ b/lib/config/app_config.dart
@@ -6,10 +6,14 @@ class AppConfig {
   static const Environment currentEnvironment = Environment.production;
   static const String appName = '本地打包';
   static const String appLogo = '';
+  static const String canonicalWebHost = 'h5-im.imharry.work';
+  static const Set<String> legacyWebHosts = {
+    'h5-test.imharry.work',
+  };
 
   static final Map<Environment, List<String>> _environmentHosts = {
     Environment.production: [
-      'h5-im.imharry.work',
+      canonicalWebHost,
     ],
   };
 
@@ -18,9 +22,8 @@ class AppConfig {
   }
 
   static String homeUrl({String? appName, String? appLogo}) {
-    final host = environmentHosts.isNotEmpty
-        ? environmentHosts.first
-        : 'h5-im.imharry.work';
+    final host =
+        environmentHosts.isNotEmpty ? environmentHosts.first : canonicalWebHost;
     final uri = Uri.parse(_normalizeHomeUrl(host));
     final queryParameters = Map<String, String>.from(uri.queryParameters)
       ..['_h5_t'] = DateTime.now().millisecondsSinceEpoch.toString();
@@ -29,7 +32,39 @@ class AppConfig {
   }
 
   static String withFreshShellParams(String url) {
-    final uri = Uri.parse(url);
+    return _removeShellParams(Uri.parse(url)).toString();
+  }
+
+  static bool shouldRewriteMainFrameUrl(String url) {
+    final uri = Uri.tryParse(url);
+    if (uri == null) {
+      return false;
+    }
+
+    final host = uri.host.toLowerCase();
+    return legacyWebHosts.contains(host) || _hasShellParams(uri);
+  }
+
+  static String canonicalizeMainFrameUrl(String url) {
+    final uri = _removeShellParams(Uri.parse(url));
+    final host = uri.host.toLowerCase();
+    if (!legacyWebHosts.contains(host)) {
+      return uri.toString();
+    }
+
+    final queryParameters = Map<String, String>.from(uri.queryParameters)
+      ..['_h5_t'] = DateTime.now().millisecondsSinceEpoch.toString();
+
+    return uri
+        .replace(
+          scheme: 'https',
+          host: canonicalWebHost,
+          queryParameters: queryParameters,
+        )
+        .toString();
+  }
+
+  static Uri _removeShellParams(Uri uri) {
     final queryParameters = Map<String, String>.from(uri.queryParameters);
     queryParameters.remove('flutter_shell');
     queryParameters.remove('shell_cache_bust');
@@ -39,14 +74,22 @@ class AppConfig {
     fragmentParameters.remove('shell_app_name');
     fragmentParameters.remove('shell_app_logo');
 
-    return uri
-        .replace(
-          queryParameters: queryParameters,
-          fragment: fragmentParameters.isEmpty
-              ? ''
-              : Uri(queryParameters: fragmentParameters).query,
-        )
-        .toString();
+    return uri.replace(
+      queryParameters: queryParameters,
+      fragment: fragmentParameters.isEmpty
+          ? ''
+          : Uri(queryParameters: fragmentParameters).query,
+    );
+  }
+
+  static bool _hasShellParams(Uri uri) {
+    final fragmentParameters = Uri.splitQueryString(uri.fragment);
+    return uri.queryParameters.containsKey('flutter_shell') ||
+        uri.queryParameters.containsKey('shell_cache_bust') ||
+        uri.queryParameters.containsKey('shell_app_name') ||
+        uri.queryParameters.containsKey('shell_app_logo') ||
+        fragmentParameters.containsKey('shell_app_name') ||
+        fragmentParameters.containsKey('shell_app_logo');
   }
 
   static String _normalizeHomeUrl(String host) {
diff --git a/lib/main.dart b/lib/main.dart
index 1fb3ea5..8e761f3 100644
--- a/lib/main.dart
+++ b/lib/main.dart
@@ -304,6 +304,8 @@ class _H5ShellPageState extends State<H5ShellPage> {
   }
 
   Future<void> _loadUrl(String url) async {
+    final targetUrl = AppConfig.canonicalizeMainFrameUrl(url);
+
     if (mounted) {
       setState(() {
         _loadError = null;
@@ -313,7 +315,7 @@ class _H5ShellPageState extends State<H5ShellPage> {
     }
 
     await _clearWebViewHttpCache();
-    await _controller.loadRequest(Uri.parse(url));
+    await _controller.loadRequest(Uri.parse(targetUrl));
   }
 
   Future<void> _clearWebViewHttpCache() async {
@@ -334,6 +336,11 @@ class _H5ShellPageState extends State<H5ShellPage> {
 
     const webSchemes = {'http', 'https', 'about', 'data'};
     if (webSchemes.contains(uri.scheme)) {
+      if (request.isMainFrame &&
+          AppConfig.shouldRewriteMainFrameUrl(request.url)) {
+        unawaited(_loadUrl(AppConfig.canonicalizeMainFrameUrl(request.url)));
+        return NavigationDecision.prevent;
+      }
       return NavigationDecision.navigate;
     }
 
diff --git a/test/widget_test.dart b/test/widget_test.dart
index 3cfbcd3..418304e 100644
--- a/test/widget_test.dart
+++ b/test/widget_test.dart
@@ -47,4 +47,22 @@ void main() {
     expect(Uri.splitQueryString(uri.fragment).containsKey('shell_app_logo'),
         isFalse);
   });
+
+  test('rewrites legacy H5 host main-frame URLs to the canonical host', () {
+    final uri = Uri.parse(
+      AppConfig.canonicalizeMainFrameUrl(
+        'https://h5-test.imharry.work/login?from=runtime'
+        '&shell_app_name=Old#shell_app_logo=old',
+      ),
+    );
+
+    expect(uri.scheme, 'https');
+    expect(uri.host, 'h5-im.imharry.work');
+    expect(uri.path, '/login');
+    expect(uri.queryParameters['from'], 'runtime');
+    expect(uri.queryParameters.containsKey('_h5_t'), isTrue);
+    expect(uri.queryParameters.containsKey('shell_app_name'), isFalse);
+    expect(Uri.splitQueryString(uri.fragment).containsKey('shell_app_logo'),
+        isFalse);
+  });
 }