diff --git a/sdk/src/main/java/cn/wildfirechat/sdk/ChannelAdmin.java b/sdk/src/main/java/cn/wildfirechat/sdk/ChannelAdmin.java
new file mode 100644
index 00000000..151cfbb0
--- /dev/null
+++ b/sdk/src/main/java/cn/wildfirechat/sdk/ChannelAdmin.java
@@ -0,0 +1,27 @@
+package cn.wildfirechat.sdk;
+
+import cn.wildfirechat.common.APIPath;
+import cn.wildfirechat.pojos.*;
+import cn.wildfirechat.sdk.model.IMResult;
+import cn.wildfirechat.sdk.utilities.AdminHttpUtils;
+
+public class ChannelAdmin {
+    public static IMResult<OutputCreateChatroom> createChannel(InputCreateChatroom input) throws Exception {
+        String path = APIPath.Create_Chatroom;
+        return AdminHttpUtils.httpJsonPost(path, input, OutputCreateChatroom.class);
+    }
+
+    public static IMResult<Void> destroyChannel(String chatroomId) throws Exception {
+        String path = APIPath.Chatroom_Destroy;
+        InputDestoryChatroom input = new InputDestoryChatroom();
+        input.setChatroomId(chatroomId);
+        return AdminHttpUtils.httpJsonPost(path, input, Void.class);
+    }
+
+    public static IMResult<OutputGetChatroomInfo> getChannelInfo(String chatroomId) throws Exception {
+        String path = APIPath.Chatroom_Info;
+        InputGetChatroomInfo input = new InputGetChatroomInfo(chatroomId);
+        return AdminHttpUtils.httpJsonPost(path, input, OutputGetChatroomInfo.class);
+    }
+    
+}
diff --git a/sdk/src/main/java/cn/wildfirechat/sdk/Main.java b/sdk/src/main/java/cn/wildfirechat/sdk/Main.java
index d4500573..425b096c 100644
--- a/sdk/src/main/java/cn/wildfirechat/sdk/Main.java
+++ b/sdk/src/main/java/cn/wildfirechat/sdk/Main.java
@@ -294,7 +294,15 @@ public class Main {
             System.exit(-1);
         }
 
-
+        List<String> multicastReceivers = Arrays.asList("user2", "user3", "user4");
+        IMResult<MultiMessageResult> resultMulticastMessage = MessageAdmin.multicastMessage("user1", multicastReceivers, 0, payload);
+        if (resultMulticastMessage != null && resultMulticastMessage.getErrorCode() == ErrorCode.ERROR_CODE_SUCCESS) {
+            System.out.println("multi message success, messageid is " + resultMulticastMessage.getResult().getMessageUid());
+        } else {
+            System.out.println("multi message failure");
+            System.exit(-1);
+        }
+        
         IMResult<SystemSettingPojo> resultGetSystemSetting  =  GeneralAdmin.getSystemSetting(Group_Max_Member_Count);
         if (resultGetSystemSetting != null && resultGetSystemSetting.getErrorCode() == ErrorCode.ERROR_CODE_SUCCESS) {
             System.out.println("success");
diff --git a/sdk/src/main/java/cn/wildfirechat/sdk/MessageAdmin.java b/sdk/src/main/java/cn/wildfirechat/sdk/MessageAdmin.java
index 4493ee23..c1d6087e 100644
--- a/sdk/src/main/java/cn/wildfirechat/sdk/MessageAdmin.java
+++ b/sdk/src/main/java/cn/wildfirechat/sdk/MessageAdmin.java
@@ -5,6 +5,8 @@ import cn.wildfirechat.pojos.*;
 import cn.wildfirechat.sdk.model.IMResult;
 import cn.wildfirechat.sdk.utilities.AdminHttpUtils;
 
+import java.util.List;
+
 public class MessageAdmin {
     public static IMResult<SendMessageResult> sendMessage(String sender, Conversation conversation, MessagePayload payload) throws Exception {
         String path = APIPath.Msg_Send;
@@ -31,4 +33,14 @@ public class MessageAdmin {
         messageData.setPayload(payload);
         return AdminHttpUtils.httpJsonPost(path, messageData, BroadMessageResult.class);
     }
+
+    public static IMResult<MultiMessageResult> multicastMessage(String sender, List<String> receivers, int line, MessagePayload payload) throws Exception {
+        String path = APIPath.Msg_Multicast;
+        MulticastMessageData messageData = new MulticastMessageData();
+        messageData.setSender(sender);
+        messageData.setTargets(receivers);
+        messageData.setLine(line);
+        messageData.setPayload(payload);
+        return AdminHttpUtils.httpJsonPost(path, messageData, MultiMessageResult.class);
+    }
 }