diff --git a/Src/nmNum/nmSubWxs/nmWxSensitive.cpp b/Src/nmNum/nmSubWxs/nmWxSensitive.cpp
index d431de15..0a15d057 100644
--- a/Src/nmNum/nmSubWxs/nmWxSensitive.cpp
+++ b/Src/nmNum/nmSubWxs/nmWxSensitive.cpp
@@ -612,7 +612,8 @@ void nmWxSensitivityScatter::updateThreshold()
 {
     // 阈值以下的点填黑，并同步图例中的阈值显示。
     if(m_parameter->currentIndex() < 0) return;
-    if(m_results->m_dFilterThreshold != m_threshold) {
+    // 拖动时只更新图内反馈，松开后再保存阈值并刷新结果面板。
+    if(!m_draggingThreshold && m_results->m_dFilterThreshold != m_threshold) {
         m_results->m_dFilterThreshold = m_threshold;
         emit filterChanged();
     }
@@ -699,8 +700,8 @@ bool nmWxSensitivityScatter::eventFilter(QObject* object, QEvent* event)
            m_plot->m_pPlot->getInnerRectF().contains(scene) && qAbs(mouse->pos().y() - lineY) <= 6.0) m_draggingThreshold = true;
         if(m_draggingThreshold) {
             m_threshold = qBound(0.0, axisY->getValueForPos(scene.y()), axisY->getRangeMax());
-            updateThreshold();
             if(event->type() == QEvent::MouseButtonRelease) m_draggingThreshold = false;
+            updateThreshold();
             return true;
         }
     }