diff --git a/common/src/main/java/cn/wildfirechat/common/APIPath.java b/common/src/main/java/cn/wildfirechat/common/APIPath.java
index bbb7d493..51fd24ad 100644
--- a/common/src/main/java/cn/wildfirechat/common/APIPath.java
+++ b/common/src/main/java/cn/wildfirechat/common/APIPath.java
@@ -88,6 +88,7 @@ public interface APIPath {
     String Msg_Delivery = "/admin/message/delivery";
     String Conversation_Delete = "/admin/conversation/delete";
     String Msg_Clear_By_User = "/admin/message/clear_by_user";
+    String Msg_Import = "/admin/message/import";
 
     String Create_Group = "/admin/group/create";
     String Group_Dismiss = "/admin/group/del";
diff --git a/common/src/main/java/cn/wildfirechat/pojos/ImportMessagesData.java b/common/src/main/java/cn/wildfirechat/pojos/ImportMessagesData.java
new file mode 100644
index 00000000..1bb18d0f
--- /dev/null
+++ b/common/src/main/java/cn/wildfirechat/pojos/ImportMessagesData.java
@@ -0,0 +1,24 @@
+/*
+ * 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 java.util.List;
+
+public class ImportMessagesData {
+    public static class ImportMessage {
+        public String sender;
+        public Conversation conversation;
+        public MessagePayload payload;
+        public List<String> receivers;
+        public long timestamp;
+    }
+    public List<ImportMessage> messages;
+}
diff --git a/sdk/src/main/java/cn/wildfirechat/sdk/Main.java b/sdk/src/main/java/cn/wildfirechat/sdk/Main.java
index 7d825a31..6eb2a0cc 100644
--- a/sdk/src/main/java/cn/wildfirechat/sdk/Main.java
+++ b/sdk/src/main/java/cn/wildfirechat/sdk/Main.java
@@ -17,6 +17,8 @@ import com.google.gson.GsonBuilder;
 import io.netty.util.internal.StringUtil;
 
 
+import java.io.File;
+import java.time.LocalDate;
 import java.util.*;
 
 import static cn.wildfirechat.pojos.MyInfoType.Modify_DisplayName;
@@ -154,6 +156,12 @@ public class Main {
             testMomentsApi(); // 朋友圈API测试
         }
 
+        // 商业版功能测试
+        if (commercialServer) {
+            testImportMessages();     // 导入消息测试(仅商业版)
+        }
+
+
         System.out.println("Congratulation, all admin test case passed!!!!!!!");
     }
 
@@ -911,6 +919,7 @@ public class Main {
             System.exit(-1);
         }
 
+        Thread.sleep(1000);
         IMResult<String> getGroupRemarkResult = GroupAdmin.getGroupRemark("user1", groupInfo.getTarget_id());
         if (getGroupRemarkResult != null && getGroupRemarkResult.getErrorCode() == ErrorCode.ERROR_CODE_SUCCESS && groupRemark.equals(getGroupRemarkResult.getResult())) {
             System.out.println("get group remark success");
@@ -1648,6 +1657,13 @@ public class Main {
             System.exit(-1);
         }
 
+//        IMResult<String> uploadUrlIMResult = GeneralAdmin.uploadFile(new File("/Users/rain/Workspace/server_commercial/sdk/pom.xml"));
+//        if (uploadUrlIMResult.getErrorCode() == ErrorCode.ERROR_CODE_SUCCESS) {
+//            System.out.println("update moments blocklist success");
+//        } else {
+//            System.out.println("update moments blocklist failure:" + uploadUrlIMResult.getErrorCode().code);
+//        }
+
         if (commercialServer) {
             //测试会话置顶功能
             IMResult<Void> setTopResult = GeneralAdmin.setConversationTop("user1", ProtoConstants.ConversationType.ConversationType_Private, "user2", 0, true);
@@ -2450,6 +2466,13 @@ public class Main {
             }
         }
 
+//        IMResult<String> uploadUrlIMResult = robotService.uploadFile(new File("/Users/rain/Workspace/server_commercial/sdk/pom.xml"));
+//        if (uploadUrlIMResult.getErrorCode() == ErrorCode.ERROR_CODE_SUCCESS) {
+//            System.out.println("update moments blocklist success");
+//        } else {
+//            System.out.println("update moments blocklist failure:" + uploadUrlIMResult.getErrorCode().code);
+//        }
+
         //释放机器人服务资源
         robotService.close();
     }
@@ -2818,6 +2841,74 @@ public class Main {
         }
     }
 
+    static private MessagePayload getTestPayload(int i) {
+
+        if(i%5 == 0) {
+            TextMessageContent textMessageContent = new TextMessageContent("测试文本消息" + i);
+            return textMessageContent.encode();
+        } else if(i%5 == 1) {
+            SoundMessageContent soundMessageContent = new SoundMessageContent();
+            soundMessageContent.setDuration(7 + i%10);
+            soundMessageContent.setRemoteMediaUrl("https://media.wfcoss.cn/firechat/voice_message_sample.amr");
+            return soundMessageContent.encode();
+        } else if(i%5 == 2) {
+            ImageMessageContent imageMessageContent = new ImageMessageContent();
+            String thumbnailBase64edData = "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";
+            imageMessageContent.setThumbnailBytes(Base64.getDecoder().decode(thumbnailBase64edData));
+            imageMessageContent.setRemoteMediaUrl("https://media.wfcoss.cn/firechat/image_message_sample.jpg");
+            return imageMessageContent.encode();
+        } else if(i%5 == 3) {
+            VideoMessageContent videoMessageContent = new VideoMessageContent();
+            String thumbnailBase64edData = "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";
+            videoMessageContent.setThumbnailBytes(Base64.getDecoder().decode(thumbnailBase64edData));
+            videoMessageContent.setDuration(3);
+            videoMessageContent.setRemoteMediaUrl("https://media.wfcoss.cn/firechat/video_message_sample.mov");
+            return videoMessageContent.encode();
+        } else {
+            LocationMessageContent locationMessageContent = new LocationMessageContent();
+            String thumbnailBase64edData = "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";
+            locationMessageContent.setThumbnailByte(Base64.getDecoder().decode(thumbnailBase64edData));
+            locationMessageContent.setTitle("中国北京市海淀区阜成路北二街131号");
+            locationMessageContent.setLatitude(39.926537312885166);
+            locationMessageContent.setLongitude(116.32154022158235);
+            return locationMessageContent.encode();
+        }
+    }
+    static void testImportMessages() throws Exception {
+        List<ImportMessagesData.ImportMessage> importMessages = new ArrayList<>();
+        String sender = "95022ccbd25b404c80138cf275237daa";
+        String target = "admin";
+        List<String> receivers = Arrays.asList(sender, target);
+        Calendar calendar = Calendar.getInstance();
+        calendar.add(Calendar.MONTH, -1);
+        long timestamp = calendar.getTimeInMillis();
+        for (int i = 0; i < 100; i++) {
+            ImportMessagesData.ImportMessage importMessage = new ImportMessagesData.ImportMessage();
+            if(i%2==0) {
+                importMessage.sender = sender;
+                importMessage.conversation = new Conversation(0, target, 0);
+            } else {
+                importMessage.sender = target;
+                importMessage.conversation = new Conversation(0, sender, 0);
+            }
+            //消息所属用户
+            importMessage.receivers = receivers;
+            importMessage.timestamp = timestamp;
+            importMessage.payload = getTestPayload(i);
+
+            timestamp -= 300*1000;
+
+            importMessages.add(importMessage);
+        }
+        IMResult<Void> imResult = MessageAdmin.importMessage(importMessages);
+        if (imResult != null && imResult.getErrorCode() == ErrorCode.ERROR_CODE_SUCCESS) {
+            System.out.println("Import success");
+        } else {
+            System.out.println("Create device failure");
+            System.exit(-1);
+        }
+    }
+
     //***********************************************
     //****  物联网相关的API，仅专业版支持
     //***********************************************
diff --git a/sdk/src/main/java/cn/wildfirechat/sdk/MessageAdmin.java b/sdk/src/main/java/cn/wildfirechat/sdk/MessageAdmin.java
index 6f47b4f3..f6adcece 100644
--- a/sdk/src/main/java/cn/wildfirechat/sdk/MessageAdmin.java
+++ b/sdk/src/main/java/cn/wildfirechat/sdk/MessageAdmin.java
@@ -5,6 +5,7 @@ import cn.wildfirechat.pojos.*;
 import cn.wildfirechat.sdk.model.IMResult;
 import cn.wildfirechat.sdk.utilities.AdminHttpUtils;
 
+import java.util.ArrayList;
 import java.util.List;
 
 /**
@@ -293,4 +294,20 @@ public class MessageAdmin {
         InputUserId input = new InputUserId(userId);
         return AdminHttpUtils.httpJsonPost(path, input, OutputTimestamp.class);
     }
+
+    /**
+     * 导入消息。只用在服务为正式使用之前，从别的IM服务进行导入历史消息。当导入时，只能部署一个节点，可以多线程导入。当导入结束后，检查有没有异常日志，如果有异常日志需要解决后重新导入。
+     * 当导入完成后，重启IM服务（不要用kill -9，需要等待缓存写入）。重启之后再用客户端验证是否有历史消息可以从远端加载。另外需要保留之前IM服务的备份记录，以防有消息泄漏。
+     * 下面所有参数必须有效才行，如果是群组消息，还需要先创建群组。
+     *
+     * @param messages 消息列表
+     * @return  导入结果
+     * @throws Exception
+     */
+    public static IMResult<Void> importMessage(List<ImportMessagesData.ImportMessage> messages) throws Exception {
+        String path = APIPath.Msg_Import;
+        ImportMessagesData messageData = new ImportMessagesData();
+        messageData.messages = messages;
+        return AdminHttpUtils.httpJsonPost(path, messageData, Void.class);
+    }
 }