diff --git a/protos/device_state.proto b/protos/device_state.proto
index b389750..72bb6c8 100644
--- a/protos/device_state.proto
+++ b/protos/device_state.proto
@@ -697,12 +697,13 @@ message SimulationThirdPartyApiServiceState {
   SimulationThirdPartyApiService.State state = 2;
 }
 
+//列车控制状态
 message TrainControlState{
-  TrainConnState connState = 1;
-  EmergentButton ebutton = 2;
-  repeated DriverKeySwitch driverKey = 3;
-  DirectionKeySwitch dirKey = 4;
-  PushHandler pushHandler = 5;
+  TrainConnState connState = 1; //列车连接第三方状态
+  EmergentButton ebutton = 2; //紧急摁钮
+  repeated DriverKeySwitch driverKey = 3; //驾驶端激活
+  DirectionKeySwitch dirKey = 4; //接车运行方向
+  PushHandler pushHandler = 5; //牵引制动手柄
 
   message EmergentButton{
     uint32  id = 1;