diff --git a/protos/device_info.proto b/protos/device_info.proto
index cca1715..c0bc7d0 100644
--- a/protos/device_info.proto
+++ b/protos/device_info.proto
@@ -15,17 +15,14 @@ message Section {
   // 关联区段
   repeated string childrenId = 3;
 
-  // 公里标
-  repeated graphicData.KilometerSystem kilometerSystem = 4;
-
-  // 转换后的公里标数字
-  repeated int64 convertKilometer = 5;
-  
   // 物理区段Id
-  string physicalSectionId = 6;
-  
+  string physicalSectionId = 4;
+
   // 目的地码
-  string destinationCode = 7;
+  string destinationCode = 5;
+
+  // 公里标信息
+  DeviceKilometer kilometer = 6;
 }
 
 // 道岔
@@ -35,10 +32,16 @@ message Turnout {
 
   string code = 2;
 
-  // 关联道岔的公里标
-  repeated graphicData.KilometerSystem kilometerSystem = 3;
-
-  // 转换后的公里标数字
-  repeated int64 convertKilometer = 4;
+  // 公里标信息
+  DeviceKilometer kilometer = 3;
 }
 
+// 公共属性
+message DeviceKilometer {
+
+  int64 minKilometer = 1;
+
+  int64 maxKilometer = 2;
+
+  repeated graphicData.KilometerSystem kilometerSystem = 3;
+}
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