diff --git a/src/pages/Measure.tsx b/src/pages/Measure.tsx
index c1a5807..290aa64 100644
--- a/src/pages/Measure.tsx
+++ b/src/pages/Measure.tsx
@@ -31,6 +31,7 @@ export default function Measure() {
   const measureState = useAppSelector((state) => state.measure);
   const contextState = useAppSelector((state) => state.context);
   const baseState = useAppSelector((state) => state.baseData);
+  const device = useAppSelector((state) => state.context.device);
   const [railPickerVisible, setRailPickerVisible] = useState(false);
   const [railId, setRailId] = useState<(number | string | null)[]>([]);
   const canvasRef = useRef<MeasurementCanvasRef>(null);
@@ -54,6 +55,8 @@ export default function Measure() {
     }
   }
 
+
+
   // 检查轨型有没有坐标，如果有，绘制轨型基准线，如果没，拉取再绘制其线
   useEffect(() => {
     if (railId.length > 0) {
@@ -137,6 +140,20 @@ export default function Measure() {
   const [initStart, setInitStart] = useState(false);
 
   const [measurementCanvasKey, setMeasurementCanvasKey] = useState(0);
+
+  useEffect(() => {
+    if (!device.connected) {
+      setState({
+        left_ready: 'none',
+        right_ready: 'none',
+        left_begin: 'none',
+        right_begin: 'none',
+        left_end: 'none',
+        right_end: 'none',
+      })
+      setMeasurementCanvasKey(measurementCanvasKey + 1)
+    }
+  }, [device, measurementCanvasKey]);
   const onStartClick = () => {
     setMeasurementCanvasKey(measurementCanvasKey+1)
     setshowCalibration(false);