diff --git a/common/src/main/java/cn/wildfirechat/common/APIPath.java b/common/src/main/java/cn/wildfirechat/common/APIPath.java
index 4462df65..a5126153 100644
--- a/common/src/main/java/cn/wildfirechat/common/APIPath.java
+++ b/common/src/main/java/cn/wildfirechat/common/APIPath.java
@@ -53,6 +53,7 @@ public interface APIPath {
     String Group_Member_Kickoff = "/admin/group/member/del";
     String Group_Member_Quit = "/admin/group/member/quit";
     String Group_Set_Manager = "/admin/group/manager/set";
+    String Group_Mute_Member = "/admin/group/manager/mute";
     String Get_User_Groups = "/admin/group/of_user";
 
 
diff --git a/common/src/main/java/cn/wildfirechat/pojos/GroupNotificationBinaryContent.java b/common/src/main/java/cn/wildfirechat/pojos/GroupNotificationBinaryContent.java
index 8ad45e8b..49c1caf4 100644
--- a/common/src/main/java/cn/wildfirechat/pojos/GroupNotificationBinaryContent.java
+++ b/common/src/main/java/cn/wildfirechat/pojos/GroupNotificationBinaryContent.java
@@ -145,6 +145,8 @@ public class GroupNotificationBinaryContent {
         return getGroupNotifyContent(ProtoConstants.MESSAGE_CONTENT_TYPE_SET_MANAGER);
     }
 
-
+    public WFCMessage.MessageContent getMuteGroupMemberNotifyContent() {
+        return getGroupNotifyContent(ProtoConstants.MESSAGE_CONTENT_TYPE_MUTE_MEMBER);
+    }
 
 }
diff --git a/common/src/main/java/cn/wildfirechat/pojos/InputMuteGroupMember.java b/common/src/main/java/cn/wildfirechat/pojos/InputMuteGroupMember.java
new file mode 100755
index 00000000..b767d579
--- /dev/null
+++ b/common/src/main/java/cn/wildfirechat/pojos/InputMuteGroupMember.java
@@ -0,0 +1,72 @@
+/*
+ * This file is part of the Wildfire Chat package.
+ * (c) Heavyrain2012 <heavyrain.lee@gmail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+package cn.wildfirechat.pojos;
+
+
+import cn.wildfirechat.proto.WFCMessage;
+import io.netty.util.internal.StringUtil;
+
+import java.util.List;
+
+public class InputMuteGroupMember extends InputGroupBase {
+    private String group_id;
+    private List<String> members;
+    private boolean is_manager;
+
+    public String getGroup_id() {
+        return group_id;
+    }
+
+    public void setGroup_id(String group_id) {
+        this.group_id = group_id;
+    }
+
+    public List<String> getMembers() {
+        return members;
+    }
+
+    public void setMembers(List<String> members) {
+        this.members = members;
+    }
+
+    public boolean isIs_manager() {
+        return is_manager;
+    }
+
+    public void setIs_manager(boolean is_manager) {
+        this.is_manager = is_manager;
+    }
+
+    public boolean isValide() {
+        if (StringUtil.isNullOrEmpty(operator) || StringUtil.isNullOrEmpty(group_id) || members == null || members.isEmpty()) {
+            return false;
+        }
+        return true;
+    }
+
+    public WFCMessage.SetGroupManagerRequest toProtoGroupRequest() {
+        WFCMessage.SetGroupManagerRequest.Builder addGroupBuilder = WFCMessage.SetGroupManagerRequest.newBuilder();
+        addGroupBuilder.setGroupId(group_id);
+        addGroupBuilder.addAllUserId(members);
+        addGroupBuilder.setType(is_manager ? 1 : 0);
+
+        if (to_lines != null) {
+            for (Integer line : to_lines
+            ) {
+                addGroupBuilder.addToLine(line);
+            }
+        }
+
+        if (notify_message != null) {
+            addGroupBuilder.setNotifyContent(notify_message.toProtoMessageContent());
+        }
+        return addGroupBuilder.build();
+    }
+
+}
diff --git a/common/src/main/java/cn/wildfirechat/proto/ProtoConstants.java b/common/src/main/java/cn/wildfirechat/proto/ProtoConstants.java
index 8f169e02..d432dad2 100644
--- a/common/src/main/java/cn/wildfirechat/proto/ProtoConstants.java
+++ b/common/src/main/java/cn/wildfirechat/proto/ProtoConstants.java
@@ -181,5 +181,6 @@ public class ProtoConstants {
     public static final int MESSAGE_CONTENT_TYPE_CHANGE_SEARCHABLE = 116;
 
     public static final int MESSAGE_CONTENT_TYPE_SET_MANAGER = 117;
+    public static final int MESSAGE_CONTENT_TYPE_MUTE_MEMBER = 118;
 }
 
diff --git a/sdk/src/main/java/cn/wildfirechat/sdk/GroupAdmin.java b/sdk/src/main/java/cn/wildfirechat/sdk/GroupAdmin.java
index 5c23beab..fae8a5b2 100644
--- a/sdk/src/main/java/cn/wildfirechat/sdk/GroupAdmin.java
+++ b/sdk/src/main/java/cn/wildfirechat/sdk/GroupAdmin.java
@@ -101,7 +101,17 @@ public class GroupAdmin {
         return AdminHttpUtils.httpJsonPost(path, addGroupMember, Void.class);
     }
 
-
+    public static IMResult<Void> muteGroupMemeber(String operator, String groupId, List<String> groupMemberIds, boolean isManager, List<Integer> to_lines, MessagePayload  notify_message) throws Exception {
+        String path = APIPath.Group_Mute_Member;
+        InputMuteGroupMember addGroupMember = new InputMuteGroupMember();
+        addGroupMember.setGroup_id(groupId);
+        addGroupMember.setMembers(groupMemberIds);
+        addGroupMember.setIs_manager(isManager);
+        addGroupMember.setOperator(operator);
+        addGroupMember.setTo_lines(to_lines);
+        addGroupMember.setNotify_message(notify_message);
+        return AdminHttpUtils.httpJsonPost(path, addGroupMember, Void.class);
+    }
 
     public static IMResult<Void> kickoffGroupMembers(String operator, String groupId, List<String> groupMemberIds, List<Integer> to_lines, MessagePayload  notify_message) throws Exception {
         String path = APIPath.Group_Member_Kickoff;
diff --git a/sdk/src/main/java/cn/wildfirechat/sdk/Main.java b/sdk/src/main/java/cn/wildfirechat/sdk/Main.java
index 536176c1..3fa86995 100644
--- a/sdk/src/main/java/cn/wildfirechat/sdk/Main.java
+++ b/sdk/src/main/java/cn/wildfirechat/sdk/Main.java
@@ -37,6 +37,7 @@ public class Main {
         testChatroom();
         testMessage();
         testGeneralApi();
+        testDevice();
 
         System.out.println("Congratulation, all admin test case passed!!!!!!!");
     }
@@ -413,6 +414,23 @@ public class Main {
             System.exit(-1);
         }
 
+        voidIMResult = GroupAdmin.muteGroupMemeber("user1", groupInfo.getTarget_id(), Arrays.asList("user4", "user5"), true, null, null);
+        if (voidIMResult != null && voidIMResult.getErrorCode() == ErrorCode.ERROR_CODE_SUCCESS) {
+            System.out.println("mute group member success");
+        } else {
+            System.out.println("mute group member failure");
+            System.exit(-1);
+        }
+
+        voidIMResult = GroupAdmin.muteGroupMemeber("user1", groupInfo.getTarget_id(), Arrays.asList("user4", "user5"), false, null, null);
+        if (voidIMResult != null && voidIMResult.getErrorCode() == ErrorCode.ERROR_CODE_SUCCESS) {
+            System.out.println("unmute group member success");
+        } else {
+            System.out.println("unmute group member failure");
+            System.exit(-1);
+        }
+
+
 
         voidIMResult = GroupAdmin.quitGroup("user4", groupInfo.getTarget_id(), null, null);
         if (voidIMResult != null && voidIMResult.getErrorCode() == ErrorCode.ERROR_CODE_SUCCESS) {