diff --git a/broker/src/main/java/io/moquette/persistence/DatabaseStore.java b/broker/src/main/java/io/moquette/persistence/DatabaseStore.java
index b165343f..c134ed48 100644
--- a/broker/src/main/java/io/moquette/persistence/DatabaseStore.java
+++ b/broker/src/main/java/io/moquette/persistence/DatabaseStore.java
@@ -191,7 +191,7 @@ public class DatabaseStore {
             }
 
 
-            sql += " and _type <> 2"; //can search normal user(0) and robot(1), can not search things
+            sql += " and _type <> 2"; //can search normal user(0) and robot(1) and admin(100), can not search things
 
             if (searchType == SearchUserType_Name_Mobile || searchType == SearchUserType_Name || searchType == SearchUserType_Mobile) {
                 sql += " limit 1";
diff --git a/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java b/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java
index aa864ebc..a1a04172 100755
--- a/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java
+++ b/broker/src/main/java/io/moquette/persistence/MemoryMessagesStore.java
@@ -22,6 +22,7 @@ import cn.wildfirechat.proto.WFCMessage;
 import com.google.protobuf.ByteString;
 import com.hazelcast.core.*;
 import com.hazelcast.util.StringUtil;
+import com.xiaoleilu.hutool.system.UserInfo;
 import com.xiaoleilu.loServer.model.FriendData;
 import cn.wildfirechat.pojos.InputOutputUserBlockStatus;
 import cn.wildfirechat.common.ErrorCode;
@@ -1684,6 +1685,20 @@ public class MemoryMessagesStore implements IMessagesStore {
         }
 
         if (mDisableStrangerChat) {
+            //在禁止私聊时，允许机器人，物联网设备及管理员进行私聊。
+            IMap<String, WFCMessage.User> mUserMap = hzInstance.getMap(USERS);
+            WFCMessage.User target = mUserMap.get(targetUser);
+            if (target != null && target.getType() != ProtoConstants.UserType.UserType_Normal) {
+                return ErrorCode.ERROR_CODE_SUCCESS;
+            }
+            target = mUserMap.get(fromUser);
+            if (target != null && target.getType() != ProtoConstants.UserType.UserType_Normal) {
+                return ErrorCode.ERROR_CODE_SUCCESS;
+            }
+            //admin的usertype为3，所以不需要hardcode为admin添加例外
+//            if (targetUser.equals("admin") || fromUser.equals("admin")) {
+//                return ErrorCode.ERROR_CODE_SUCCESS;
+//            }
             return ErrorCode.ERROR_CODE_NOT_RIGHT;
         }
 
diff --git a/common/src/main/java/cn/wildfirechat/proto/ProtoConstants.java b/common/src/main/java/cn/wildfirechat/proto/ProtoConstants.java
index c60deaca..7bac27a4 100644
--- a/common/src/main/java/cn/wildfirechat/proto/ProtoConstants.java
+++ b/common/src/main/java/cn/wildfirechat/proto/ProtoConstants.java
@@ -125,6 +125,8 @@ public class ProtoConstants {
         int UserType_Normal = 0;
         int UserType_Robot = 1;
         int UserType_Device = 2;
+        int UserType_Admin = 3;
+        int UserType_Super_Admin = 100;
     }