diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
index bc85bb0f..da06972b 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/MpMasterService.java
@@ -50,7 +50,6 @@ import java.lang.reflect.Method;
 import java.nio.channels.FileLock;
 import java.text.SimpleDateFormat;
 import java.util.Arrays;
-import java.util.Calendar;
 import java.util.Date;
 import java.util.List;
 import java.util.logging.Level;
@@ -765,65 +764,67 @@ public class MpMasterService extends Service {
     }
 
     private void registerHeartbeatTimer() {
-        long delaySec = 20; // 比i1延迟20秒
-        long interval = mHeartbeatDuration; // 距离下一次间隔，默认10分钟
-        boolean keepAlive = false;
-        long currentSec = System.currentTimeMillis() / 1000;
 
+        long timeout = mHeartbeatDuration;
+        boolean keepAlive = false;
+        long currentTimeMs = System.currentTimeMillis();
         if (mMntnMode) {
-            // 无延迟
-            delaySec = 0;
             if (mQuickHbMode) {
-                interval = mQuickHeartbeatDuration;
+                timeout = mQuickHeartbeatDuration;
             }
-            registerHeartbeatTimer((currentSec + interval + delaySec) * 1000, keepAlive);
+            registerHeartbeatTimer(currentTimeMs + timeout * 1000, keepAlive);
         } else {
+            long closestTime = -1;
             if (mUsingAbsHbTime) {
-                long expandSec = 120; // 扩展2分钟之内的都触发
-                Calendar calendar = Calendar.getInstance();
-                calendar.set(Calendar.HOUR_OF_DAY, 0);
-                calendar.set(Calendar.MINUTE, 0);
-                calendar.set(Calendar.SECOND, 0);
-                calendar.set(Calendar.MILLISECOND, 0);
-                long todayZero = calendar.getTimeInMillis() / 1000;
-                long todaySec = currentSec - todayZero;
-
-                long nextAbsSec = this.getNextAbsSec(todaySec);
-                if (nextAbsSec - todaySec > interval + expandSec) {
+                Date dt = new Date();
+                long ts = dt.getTime();
+                ts -= ts % 1000;
+
+                dt.setHours(0);
+                dt.setMinutes(0);
+                dt.setSeconds(0);
+
+                long zeroPoint = dt.getTime();
+                zeroPoint -= zeroPoint % 1000;
+                long offsetTs = (ts - zeroPoint) / 1000;
+
+                if (mAbsHeartbeatTimes != null && mAbsHeartbeatTimes.length > 0) {
+
+                    for (int i = 0; i < mAbsHeartbeatTimes.length; i++) {
+                        if (mAbsHeartbeatTimes[i] > offsetTs) {
+                            closestTime = mAbsHeartbeatTimes[i];
+                            break;
+                        }
+                    }
+
+                    if (closestTime == -1) {
+                        // next day
+                        closestTime = mAbsHeartbeatTimes[0] + 86400;
+                    }
+                } else {
+                    closestTime = 9 * 3600 + 13 * 60;
+                    if (offsetTs > closestTime) {
+                        closestTime += 86400;
+                    }
+                }
+
+                if (zeroPoint + closestTime * 1000 > currentTimeMs + mMpHeartbeatDuration) {
                     keepAlive = true;
-                    registerHeartbeatTimer((currentSec + interval + delaySec) * 1000, keepAlive);
+                    registerHeartbeatTimer(currentTimeMs + mMpHeartbeatDuration + 5000, keepAlive);
                 } else {
-                    registerHeartbeatTimer((todayZero + nextAbsSec) * 1000, keepAlive);
+                    registerHeartbeatTimer(zeroPoint + closestTime * 1000, keepAlive);
                 }
             } else {
-                // mUsingAbsHbTime=false，间隔10分钟 + 延迟
-                registerHeartbeatTimer((currentSec + interval + delaySec) * 1000, keepAlive);
-            }
-        }
-    }
-
-    private long getNextAbsSec(long todaySec) {
-        long nextAbsSec = -1;
-        if (mAbsHeartbeatTimes != null && mAbsHeartbeatTimes.length > 0) {
-            for (int i = 0; i < mAbsHeartbeatTimes.length; i++) {
-                if (mAbsHeartbeatTimes[i] > todaySec) {
-                    nextAbsSec = mAbsHeartbeatTimes[i];
-                    break;
+                // mUsingAbsHbTime: false
+                if ((mPreviousHeartbeatTime != 0) && (mPreviousHeartbeatTime - currentTimeMs < mHeartbeatDuration * 1000)) {
+                    registerHeartbeatTimer(mPreviousHeartbeatTime + mHeartbeatDuration * 1000, keepAlive);
+                } else {
+                    registerHeartbeatTimer(currentTimeMs + timeout * 1000, keepAlive);
                 }
             }
-
-            if (nextAbsSec == -1) {
-                // next day
-                nextAbsSec = mAbsHeartbeatTimes[0] + 24 * 3600;
-            }
-        } else {
-            nextAbsSec = 9 * 3600 + 13 * 60;
-            if (todaySec > nextAbsSec) {
-                nextAbsSec += 24 * 3600;
-            }
         }
-        return nextAbsSec;
     }
+
     private void registerHeartbeatTimer(long triggerTime, boolean keepAlive) {
 
         AlarmManager alarmManager = (AlarmManager) getSystemService(ALARM_SERVICE);