diff --git a/protos/device_state.proto b/protos/device_state.proto
index d575994..b8337df 100644
--- a/protos/device_state.proto
+++ b/protos/device_state.proto
@@ -281,7 +281,8 @@ message TrainDynamicState {
   // 加速
   float acceleration = 22;
   //列车位移
-  int32 Displacement = 23;
+//  int32 Displacement = 23;
+  float Displacement = 23;
 
 }
 
@@ -590,7 +591,8 @@ message TrainMapState{
   //列车B端
   TrainEndsStateMqtt trainEndsB = 64;
   //列车位移
-  int32 Displacement = 65;
+//  int32 Displacement = 65;
+  float Displacement = 65;
   // 列车车尾所在设备ID
   uint32 tailDeviceId = 66;
   // 列车车尾所在设备偏移量