diff --git a/protos/request.proto b/protos/request.proto
index 5d08efd..8411c36 100644
--- a/protos/request.proto
+++ b/protos/request.proto
@@ -189,7 +189,7 @@ message PsdParam {
 //列车控制
 message TrainControl{
   string simulationId = 1;         // 仿真id
-  uint32 trainId = 2;
+  string trainId = 2;
   uint32 deviceId = 3;//设备id
   TrainControlType controlType = 4;
   EmergentButton button = 5;// 紧急制动