diff --git a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
index 28158e77..de74aec7 100644
--- a/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
+++ b/sec-beidou-rtcm/src/main/java/com/imdroid/sideslope/executor/D331RtcmMessageExecutor.java
@@ -38,6 +38,8 @@ public class D331RtcmMessageExecutor implements Executor<D331RtcmMessage, Void>
 
     private final Logger logger = LoggerFactory.getLogger(this.getClass());
 
+    private static final Map<String ,Boolean> deviceBackupStatus = new ConcurrentHashMap<>();
+
     @Autowired
     private DeviceService deviceService;
     @Autowired
@@ -89,8 +91,26 @@ public class D331RtcmMessageExecutor implements Executor<D331RtcmMessage, Void>
                     Device primaryBase = deviceService.findByDeviceId(primaryBaseId);
                     // 如果主基站仍然在线，则跳过备选基站的数据
                     if (primaryBase != null && isBaseStationOnline(primaryBase)) {
+                        if(deviceBackupStatus.remove(deviceId) != null){
+                            logger.info("设备 {} 从备用基站 {} 切换回主基站 {}",
+                                    deviceId, id, primaryBaseId);
+                        }
                         continue;
                     }
+                    else{
+                        String hexPrimaryBase = String.format("%06x",Integer.parseInt(primaryBaseId));
+                        if(deviceBackupStatus.putIfAbsent(deviceId,true) == null){
+                            logger.info("设备 {} 从主基站 {} 切换到备用基站 {}",
+                                    deviceId, primaryBaseId, id);
+                        }
+                        
+                        byte[] modifyData = forwardBytes.clone();
+                        modifyData[5] = (byte) Integer.parseInt(hexPrimaryBase.substring(0,2),16);
+                        modifyData[6] = (byte) Integer.parseInt(hexPrimaryBase.substring(2,4),16);
+                        modifyData[7] = (byte) Integer.parseInt(hexPrimaryBase.substring(4,6),16);
+
+                        forwardBytes = modifyData;
+                    }
                 }
 
                 // 获取设备通道并发送数据