diff --git a/skywalking-alarm/src/main/java/com/ai/cloud/skywalking/alarm/AlarmProcessServer.java b/skywalking-alarm/src/main/java/com/ai/cloud/skywalking/alarm/AlarmProcessServer.java
index 33440f833..a15517300 100644
--- a/skywalking-alarm/src/main/java/com/ai/cloud/skywalking/alarm/AlarmProcessServer.java
+++ b/skywalking-alarm/src/main/java/com/ai/cloud/skywalking/alarm/AlarmProcessServer.java
@@ -38,7 +38,7 @@ public class AlarmProcessServer {
             processThreads.add(tmpThread);
         }
         logger.info("Successfully launched {} processing threads.", Config.Server.PROCESS_THREAD_SIZE);
-        new UserInfoInspectThread().start();
+        new UserNumberInspectThread().start();
         logger.info("Successfully launched the thread that inspect the number of user");
         logger.info("Alarm process server successfully started.");
         while (true) {
diff --git a/skywalking-alarm/src/main/java/com/ai/cloud/skywalking/alarm/UserInfoInspectThread.java b/skywalking-alarm/src/main/java/com/ai/cloud/skywalking/alarm/UserNumberInspectThread.java
similarity index 73%
rename from skywalking-alarm/src/main/java/com/ai/cloud/skywalking/alarm/UserInfoInspectThread.java
rename to skywalking-alarm/src/main/java/com/ai/cloud/skywalking/alarm/UserNumberInspectThread.java
index 2ac5a9153..3a06aae4c 100644
--- a/skywalking-alarm/src/main/java/com/ai/cloud/skywalking/alarm/UserInfoInspectThread.java
+++ b/skywalking-alarm/src/main/java/com/ai/cloud/skywalking/alarm/UserNumberInspectThread.java
@@ -2,6 +2,7 @@ package com.ai.cloud.skywalking.alarm;
 
 import com.ai.cloud.skywalking.alarm.conf.Config;
 import com.ai.cloud.skywalking.alarm.dao.AlarmMessageDao;
+import com.ai.cloud.skywalking.alarm.util.MD5Encryption;
 import com.ai.cloud.skywalking.alarm.util.ZKUtil;
 import org.apache.curator.framework.recipes.locks.InterProcessMutex;
 import org.apache.logging.log4j.LogManager;
@@ -10,13 +11,13 @@ import org.apache.logging.log4j.Logger;
 import java.sql.SQLException;
 import java.util.concurrent.TimeUnit;
 
-public class UserInfoInspectThread extends Thread {
+public class UserNumberInspectThread extends Thread {
 
     private boolean isInspector = false;
     private InterProcessMutex inspectorLock = new InterProcessMutex(ZKUtil.getZkClient(),
             Config.ZKPath.INSPECTOR_LOCK_PATH);
-    private int userHashCode;
-    private Logger logger = LogManager.getLogger(UserInfoInspectThread.class);
+    private String userIdsEncryptedStr;
+    private Logger logger = LogManager.getLogger(UserNumberInspectThread.class);
 
     public void run() {
         while (true) {
@@ -28,7 +29,7 @@ public class UserInfoInspectThread extends Thread {
                     }
 
                     isInspector = true;
-                    userHashCode = AlarmMessageDao.selectAllUserIds().toString().hashCode();
+                    userIdsEncryptedStr = MD5Encryption.getEncryption(AlarmMessageDao.selectAllUserIds().toString());
                 }
 
                 // 判断上次用户数量是否发生变化
@@ -46,11 +47,11 @@ public class UserInfoInspectThread extends Thread {
     }
 
     private boolean checkUserNumber() throws SQLException {
-        int currentUserHashCode = AlarmMessageDao.selectAllUserIds().toString().hashCode();
-        if (userHashCode == currentUserHashCode) {
+        String currentUserIdsEncryptedStr = MD5Encryption.getEncryption(AlarmMessageDao.selectAllUserIds().toString());
+        if (userIdsEncryptedStr == currentUserIdsEncryptedStr) {
             return false;
         }
-        userHashCode = currentUserHashCode;
+        userIdsEncryptedStr = currentUserIdsEncryptedStr;
         return true;
     }
 }
diff --git a/skywalking-alarm/src/main/java/com/ai/cloud/skywalking/alarm/util/MD5Encryption.java b/skywalking-alarm/src/main/java/com/ai/cloud/skywalking/alarm/util/MD5Encryption.java
new file mode 100644
index 000000000..c61207936
--- /dev/null
+++ b/skywalking-alarm/src/main/java/com/ai/cloud/skywalking/alarm/util/MD5Encryption.java
@@ -0,0 +1,35 @@
+package com.ai.cloud.skywalking.alarm.util;
+
+import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.Logger;
+
+import java.security.MessageDigest;
+import java.security.NoSuchAlgorithmException;
+
+public class MD5Encryption {
+    private static Logger logger = LogManager.getLogger(DBConnectUtil.class);
+
+    private MD5Encryption() {
+    }
+
+    public static String getEncryption(String originString) {
+        String result = null;
+        if (originString != null) {
+            try {
+                MessageDigest md = MessageDigest.getInstance("MD5");
+                byte bytes[] = md.digest(originString.getBytes());
+                for (int i = 0; i < bytes.length; i++) {
+                    String str = Integer.toHexString(bytes[i] & 0xFF);
+                    if (str.length() == 1) {
+                        str += "F";
+                    }
+                    result += str;
+                }
+            } catch (NoSuchAlgorithmException e) {
+                logger.error("No such algorithmException.", e);
+                return originString;
+            }
+        }
+        return result.toUpperCase();
+    }
+}
\ No newline at end of file