diff --git a/protos/device_state.proto b/protos/device_state.proto
index 2e5fba3..a6db553 100644
--- a/protos/device_state.proto
+++ b/protos/device_state.proto
@@ -213,6 +213,7 @@ message TrainState{
 //  TrainBtmCache BtmBaliseCache = 40;
   TrainPort trainPort = 40; //列车当前驾驶的端口
   map<int32,SensorSpeedPulseCount> pulseCountMap = 41; //列车每端对应的速度 key = TrainPort 枚举的值
+  uint32 trainCoachNum = 42 ;//列车编组信息
   enum TrainPort{
     PORT_NONE = 0;
     PORT_A=1;