diff --git a/protos/device_info.proto b/protos/device_info.proto
index abf16ea..cd0764c 100644
--- a/protos/device_info.proto
+++ b/protos/device_info.proto
@@ -32,10 +32,14 @@ message Switch {
 
   string code = 2;
 
-  // 公里标
-  repeated graphicData.KilometerSystem kilometerSystem = 3;
+  graphicData.KilometerSystem switchKilometerSystem = 3;
+
+  int64 switchConvertKilometer = 4;
+
+  // 关联道岔的公里标
+  repeated graphicData.KilometerSystem kilometerSystem = 5;
 
   // 转换后的公里标数字
-  repeated int64 convertKilometer = 4;
+  repeated int64 convertKilometer = 6;
 }