diff --git a/app/src/main/java/com/example/kingway/ptt/CallBackResolution.java b/app/src/main/java/com/example/kingway/ptt/CallBackResolution.java
index e2d0187..7fef131 100644
--- a/app/src/main/java/com/example/kingway/ptt/CallBackResolution.java
+++ b/app/src/main/java/com/example/kingway/ptt/CallBackResolution.java
@@ -28,6 +28,7 @@ public class CallBackResolution {
     private static boolean loginState = false;
     private static String pttLoginStatus = "00"; // 00-未登录 01-登录中 02-已登录
     private static String pttLoginId = "";
+    private static ScheduledExecutorService keepAliveExecutor = null;
 
     public static String getPttLoginStatus() {
         return pttLoginStatus;
@@ -543,13 +544,16 @@ public class CallBackResolution {
                 if (tempTxt.contains("已登录")) {
                     String showName = tempTxt.substring(3, tempTxt.length());
                     CallBackUtil.callBackLogin(true, showName);
-                    ScheduledExecutorService executor = Executors.newScheduledThreadPool(1);
+                    if (keepAliveExecutor != null && !keepAliveExecutor.isShutdown()) {
+                        keepAliveExecutor.shutdownNow();
+                    }
+                    keepAliveExecutor = Executors.newSingleThreadScheduledExecutor();
                     Runnable task = () -> {
                         Timber.tag(TAG).d( "callBackLogin send tcp and udp");
                         SendAtUtil.sendUDP();
                         SendAtUtil.sendTCP();
                     };
-                    executor.scheduleAtFixedRate(task, 0, 40, TimeUnit.SECONDS);
+                    keepAliveExecutor.scheduleAtFixedRate(task, 0, 40, TimeUnit.SECONDS);
                 } else if (tempTxt.contains("账号已更新")) {
                     Timber.tag(TAG).w("TTS reports account updated: '%s'", tempTxt);
                 } else if (tempTxt.contains("账号或密码错误")) {