diff --git a/logPlus/qmycustomplot.cpp b/logPlus/qmycustomplot.cpp
index 6982de0..781daa8 100644
--- a/logPlus/qmycustomplot.cpp
+++ b/logPlus/qmycustomplot.cpp
@@ -4888,7 +4888,9 @@ void QMyCustomPlot::s_DelSelectShiftLineFromPlot(QString strUuid, QString strSlf
     {
         TransparentDraggableLine *pDraggableLine = (TransparentDraggableLine *)m_SelectShiftLine;
         pDraggableLine->deleteRect();
+        m_SelectShiftLine = nullptr;
     }
+    replot();
 }
 
 //清除全部分段线
@@ -4914,7 +4916,9 @@ void QMyCustomPlot::s_DelAllShiftLineFromPlot(QString strUuid, QString strSlfNam
         pDraggableLine = (TransparentDraggableLine*)it.value();
         it++;
         pDraggableLine->deleteRect();
+        m_SelectShiftLine = nullptr;
     }
+    this->replot();
 }
 
 //执行校正