diff --git a/lib/manager/channel_manager.dart b/lib/manager/channel_manager.dart
index 03f0efa..920d46a 100644
--- a/lib/manager/channel_manager.dart
+++ b/lib/manager/channel_manager.dart
@@ -4,6 +4,11 @@ import '../db/channel.dart';
 import '../entity/channel.dart';
 
 class WKChannelManager {
+  WKChannelManager._privateConstructor();
+  static final WKChannelManager _instance =
+      WKChannelManager._privateConstructor();
+  static WKChannelManager get shared => _instance;
+
   final List<WKChannel> _list = [];
   HashMap<String, Function(WKChannel)>? _refeshChannelMap;
   Function(String channelID, int channelType, Function(WKChannel) back)?
diff --git a/lib/manager/channel_member_manager.dart b/lib/manager/channel_member_manager.dart
index 0e31aea..8202dca 100644
--- a/lib/manager/channel_member_manager.dart
+++ b/lib/manager/channel_member_manager.dart
@@ -5,6 +5,11 @@ import 'package:wukongimfluttersdk/db/channel_member.dart';
 import '../entity/channel_member.dart';
 
 class WKChannelMemberManager {
+  WKChannelMemberManager._privateConstructor();
+  static final WKChannelMemberManager _instance =
+      WKChannelMemberManager._privateConstructor();
+  static WKChannelMemberManager get shared => _instance;
+
   HashMap<String, Function(List<WKChannelMember>)>? _newMembersBack;
   HashMap<String, Function(WKChannelMember, bool)>? _refreshMembersBack;
   HashMap<String, Function(List<WKChannelMember>)>? _deleteMembersBack;
diff --git a/lib/manager/cmd_manager.dart b/lib/manager/cmd_manager.dart
index 6119670..e8da876 100644
--- a/lib/manager/cmd_manager.dart
+++ b/lib/manager/cmd_manager.dart
@@ -3,6 +3,10 @@ import 'dart:collection';
 import '../entity/cmd.dart';
 
 class WKCMDManager {
+  WKCMDManager._privateConstructor();
+  static final WKCMDManager _instance = WKCMDManager._privateConstructor();
+  static WKCMDManager get shared => _instance;
+
   HashMap<String, Function(WKCMD)>? _cmdback;
   handleCMD(dynamic json) {
     String cmd = json['cmd'];
diff --git a/lib/manager/connect_manager.dart b/lib/manager/connect_manager.dart
index f5e3423..18c024b 100644
--- a/lib/manager/connect_manager.dart
+++ b/lib/manager/connect_manager.dart
@@ -43,6 +43,11 @@ class _WKSocket {
 }
 
 class WKConnectionManager {
+  WKConnectionManager._privateConstructor();
+  static final WKConnectionManager _instance =
+      WKConnectionManager._privateConstructor();
+  static WKConnectionManager get shared => _instance;
+
   bool isReconnection = false;
   final int reconnMilliseconds = 1500;
   Timer? heartTimer;
diff --git a/lib/manager/conversation_manager.dart b/lib/manager/conversation_manager.dart
index cddac4d..3f8e473 100644
--- a/lib/manager/conversation_manager.dart
+++ b/lib/manager/conversation_manager.dart
@@ -9,6 +9,11 @@ import '../entity/conversation.dart';
 import '../type/const.dart';
 
 class WKConversationManager {
+  WKConversationManager._privateConstructor();
+  static final WKConversationManager _instance =
+      WKConversationManager._privateConstructor();
+  static WKConversationManager get shared => _instance;
+
   HashMap<String, Function(WKUIConversationMsg, bool)>? _refeshMsgMap;
   HashMap<String, Function(String, int)>? _deleteMsgMap;
 
diff --git a/lib/manager/message_manager.dart b/lib/manager/message_manager.dart
index 4f93155..6098fa0 100644
--- a/lib/manager/message_manager.dart
+++ b/lib/manager/message_manager.dart
@@ -14,6 +14,11 @@ import '../model/wk_unknown_content.dart';
 import '../wkim.dart';
 
 class WKMessageManager {
+  WKMessageManager._privateConstructor();
+  static final WKMessageManager _instance =
+      WKMessageManager._privateConstructor();
+  static WKMessageManager get shared => _instance;
+
   final Map<int, WKMessageContent Function(dynamic data)> _msgContentList =
       HashMap<int, WKMessageContent Function(dynamic data)>();
   Function(WKMsg wkMsg, Function(WKMsg wkMsg))? _uploadAttachmentBack;
diff --git a/lib/manager/reminder_manager.dart b/lib/manager/reminder_manager.dart
index 02143ab..55ecc47 100644
--- a/lib/manager/reminder_manager.dart
+++ b/lib/manager/reminder_manager.dart
@@ -4,6 +4,11 @@ import 'package:wukongimfluttersdk/db/reminder.dart';
 import 'package:wukongimfluttersdk/entity/reminder.dart';
 
 class WKReminderManager {
+  WKReminderManager._privateConstructor();
+  static final WKReminderManager _instance =
+      WKReminderManager._privateConstructor();
+  static WKReminderManager get shared => _instance;
+
   HashMap<String, Function(List<WKReminder>)>? _newReminderback;
 
   Future<List<WKReminder>> getWithChannel(
diff --git a/lib/wkim.dart b/lib/wkim.dart
index bb44fcf..760e3bd 100644
--- a/lib/wkim.dart
+++ b/lib/wkim.dart
@@ -64,11 +64,11 @@ class WKIM {
     });
   }
 
-  WKConnectionManager connectionManager = WKConnectionManager();
-  WKMessageManager messageManager = WKMessageManager();
-  WKConversationManager conversationManager = WKConversationManager();
-  WKChannelManager channelManager = WKChannelManager();
-  WKChannelMemberManager channelMemberManager = WKChannelMemberManager();
-  WKReminderManager reminderManager = WKReminderManager();
-  WKCMDManager cmdManager = WKCMDManager();
+  WKConnectionManager connectionManager = WKConnectionManager.shared;
+  WKMessageManager messageManager = WKMessageManager.shared;
+  WKConversationManager conversationManager = WKConversationManager.shared;
+  WKChannelManager channelManager = WKChannelManager.shared;
+  WKChannelMemberManager channelMemberManager = WKChannelMemberManager.shared;
+  WKReminderManager reminderManager = WKReminderManager.shared;
+  WKCMDManager cmdManager = WKCMDManager.shared;
 }