diff --git a/Include/nmNum/nmPlot/nmObjLineMeasure.h b/Include/nmNum/nmPlot/nmObjLineMeasure.h
index 93db60a..2837e6e 100644
--- a/Include/nmNum/nmPlot/nmObjLineMeasure.h
+++ b/Include/nmNum/nmPlot/nmObjLineMeasure.h
@@ -3,7 +3,7 @@
 #include "nmObjLine.h"
 #include "nmPlot_global.h"
 
-class nmDataMeasure;
+class nmPlotGraphicBinder;
 
 
 class NM_PLOT_EXPORT nmObjLineMeasure : public nmObjLine
@@ -38,10 +38,14 @@ public:
 	virtual bool drawSelStates(QPainter* painter, QLineF& oLine) override;
 	// 创建后被调用
 	virtual void afterCreated() override;
+	// 删除测量线数据绑定
+	virtual void removeData() override;
 
+	// 注入 Binder 指针
+	void setGraphicBinder(nmPlotGraphicBinder* pBinder) { m_pGraphicBinder = pBinder; }
 
 private:
 	// 长度
 	double m_dLength;
-    nmDataMeasure* m_pMeasureData;
+	nmPlotGraphicBinder* m_pGraphicBinder;
 };
diff --git a/Include/nmNum/nmPlot/nmPlotGraphicBinder.h b/Include/nmNum/nmPlot/nmPlotGraphicBinder.h
index 715e1a8..a16de03 100644
--- a/Include/nmNum/nmPlot/nmPlotGraphicBinder.h
+++ b/Include/nmNum/nmPlot/nmPlotGraphicBinder.h
@@ -16,6 +16,8 @@ class nmObjBase;
 class nmObjRoundOutline;
 class nmObjRectOutline;
 class nmObjPolygonOutline;
+class nmDataMeasure;
+class nmObjLineMeasure;
 
 // 图元与数据绑定协调器，由 nmGuiPlot 托管
 class NM_PLOT_EXPORT nmPlotGraphicBinder : public QObject
@@ -79,6 +81,15 @@ public:
 	// 视觉属性兜底同步（画笔宽度、填充色、透明度），由边界图元在 paintBack 中调用
 	void syncOutlineVisual(nmObjBase* pGraphic);
 
+	// 调用：用户画完测量线后
+	void createMeasureForGraphic(nmObjLineMeasure* pGraphic);
+
+	// 调用：删除测量线图元前
+	void removeMeasureBinding(nmObjLineMeasure* pGraphic);
+
+	// 坐标同步：从数据对象读取起点终点，写回图元（拟合功能修改数据后由 paintBack 调用）
+	void syncMeasurePoints(nmObjLineMeasure* pGraphic);
+
 	// 切换分析时更新绑定的 DataManager，并清理旧图元的残留映射
 	void updateDataMgr(nmDataAnalyzeManager* pDataMgr);
 
@@ -152,4 +163,7 @@ private:
 
 	// 从边界数据对象读取值，写入图元本地副本（加载时用）
 	void _pushOutlineDataToGraphic(nmObjBase* pGraphic, nmDataOutline* pData);
+
+	// 测量线图元 → 数据 的映射表
+	QMap<nmObjLineMeasure*, nmDataMeasure*> m_mapMeasureData;
 };
diff --git a/Src/nmNum/nmPlot/nmGuiPlot.cpp b/Src/nmNum/nmPlot/nmGuiPlot.cpp
index 7fc0e77..4aa05df 100644
--- a/Src/nmNum/nmPlot/nmGuiPlot.cpp
+++ b/Src/nmNum/nmPlot/nmGuiPlot.cpp
@@ -1269,6 +1269,10 @@ void nmGuiPlot::deleteMeasureObjects()
 
     for(int i = 0; i < measureObjs.count(); i++) {
         if(measureObjs[i] != nullptr) {
+            nmObjLineMeasure* pMeasure = dynamic_cast<nmObjLineMeasure*>(measureObjs[i]);
+            if(pMeasure) {
+                pMeasure->removeData();
+            }
             m_pPlot->removeObjByName(measureObjs[i]->getName());
         }
     }
@@ -1286,6 +1290,10 @@ void nmGuiPlot::clearPreviousMeasure()
 
     for(int i = 0; i < measureObjs.count(); i++) {
         if(measureObjs[i] != nullptr) {
+            nmObjLineMeasure* pMeasure = dynamic_cast<nmObjLineMeasure*>(measureObjs[i]);
+            if(pMeasure) {
+                pMeasure->removeData();
+            }
             m_pPlot->removeObjByName(measureObjs[i]->getName());
         }
     }
@@ -1385,6 +1393,8 @@ void nmGuiPlot::slotDeleteOneObj(QString sName, void* obj)
                                dynamic_cast<nmObjRectOutline*>(nmObj) ||
                                dynamic_cast<nmObjPolygonOutline*>(nmObj)) {
                         m_pGraphicBinder->removeOutlineBinding(nmObj);
+                    } else if (nmObjLineMeasure* pMeasure = dynamic_cast<nmObjLineMeasure*>(nmObj)) {
+                        m_pGraphicBinder->removeMeasureBinding(pMeasure);
                     } else {
                         // 其他类型回退到旧方式
                         nmObj->removeData();
diff --git a/Src/nmNum/nmPlot/nmGuiPlotCmdHelper.cpp b/Src/nmNum/nmPlot/nmGuiPlotCmdHelper.cpp
index 29cb7d1..3169076 100644
--- a/Src/nmNum/nmPlot/nmGuiPlotCmdHelper.cpp
+++ b/Src/nmNum/nmPlot/nmGuiPlotCmdHelper.cpp
@@ -19,6 +19,7 @@
 #include "nmObjLineMeasuringScaleTool.h"
 #include "nmObjPointWellTool.h"
 #include "nmObjLineMeasureTool.h"
+#include "nmObjLineMeasure.h"
 
 #include "nmGuiPlot.h"
 #include "nmGuiPlotCmdHelper.h"
@@ -381,6 +382,14 @@ void nmGuiPlotCmdHelper::slotObjPtsFinished(QVector<QPointF>& vec) {
 				pWxPlot->graphicBinder()->createOutlineForGraphic(pPolygon);
 			}
 		}
+	} else if (pTool->getNOT() == NMOT_Line_Measure) {
+		// 先执行 afterCreated（设置锁定、只读等属性）
+		pObj->afterCreated();
+		// 再通过 Binder 创建数据并建立绑定
+		nmObjLineMeasure* pMeasure = dynamic_cast<nmObjLineMeasure*>(pObj);
+		if (pMeasure && pWxPlot->graphicBinder()) {
+			pWxPlot->graphicBinder()->createMeasureForGraphic(pMeasure);
+		}
 	} else {
 		pObj->afterCreated();
 	}
diff --git a/Src/nmNum/nmPlot/nmObjLineMeasure.cpp b/Src/nmNum/nmPlot/nmObjLineMeasure.cpp
index 87ea3e5..f9f938e 100644
--- a/Src/nmNum/nmPlot/nmObjLineMeasure.cpp
+++ b/Src/nmNum/nmPlot/nmObjLineMeasure.cpp
@@ -11,8 +11,7 @@
 #include "ZxObjText.h"
 
 #include "nmObjLineMeasure.h"
-#include "nmDataAnalyzeManager.h"
-#include "nmDataMeasure.h"
+#include "nmPlotGraphicBinder.h"
 
 ZX_DEFINE_DYNAMIC(nObjLineMeasure, nmObjLineMeasure)
 
@@ -20,7 +19,7 @@ nmObjLineMeasure::nmObjLineMeasure()
 	: nmObjLine("", NULL, NULL)
 {
 		m_dLength = 0.0;
-        m_pMeasureData = nmDataAnalyzeManager::getCurrentInstance()->getMeasureData();
+		m_pGraphicBinder = nullptr;
 		m_sObjTag = "nObjLineMeasure";
 		nmObjPoint::initFlags();
 		m_oDot = ZxDot(DTS_Circle, QColor(255, 165, 0), 0.5f, true);
@@ -35,7 +34,7 @@ nmObjLineMeasure::nmObjLineMeasure(const QString& sName, \
 	ZxSubAxisY* pAxisY)
 	: nmObjLine(sName, pAxisX, pAxisY) {
 		m_dLength = 0.0;
-        m_pMeasureData = nmDataAnalyzeManager::getCurrentInstance()->getMeasureData();
+		m_pGraphicBinder = nullptr;
 		m_sObjTag = "nObjLineMeasure";
 		nmObjPoint::initFlags();
 		m_oDot = ZxDot(DTS_Circle, QColor(255, 165, 0), 0.5f, true);
@@ -59,8 +58,12 @@ void nmObjLineMeasure::initSubObjs() {
 
 void nmObjLineMeasure::paintBack(QPainter* painter, const ZxPaintParam& param) {
 	Q_ASSERT(m_vecPoints.count() >= 2);
-    m_vecPoints[0] = m_pMeasureData->getStartPoint();
-    m_vecPoints[1] = m_pMeasureData->getEndPoint();
+
+	// 坐标同步：拟合功能修改数据后，在绘制时将新坐标推回图元
+	if (m_pGraphicBinder) {
+		m_pGraphicBinder->syncMeasurePoints(this);
+	}
+
 	QPointF pt1 = getPosOf(m_vecPoints[0]);
 	QPointF pt2 = getPosOf(m_vecPoints[1]);
 	QLineF oLine = QLineF(pt1, pt2);
@@ -113,28 +116,19 @@ bool nmObjLineMeasure::drawSelStates(QPainter* painter, QLineF& oLine) {
 }
 
 void nmObjLineMeasure::afterCreated() {
-	// ���㳤��
-	QPointF pStart = m_vecPoints[0];
-	QPointF pEnd = m_vecPoints[1];
-	double dLength = QLineF(pStart, pEnd).length();
-    if (m_pMeasureData != nullptr && pEnd != pStart) {
-        m_pMeasureData->setStartPoint(pStart);
-        m_pMeasureData->setEndPoint(pEnd);
-        nmDataAttribute lenAttr = m_pMeasureData->getLength();
-		lenAttr.setValue(dLength);
-        m_pMeasureData->setLength(lenAttr);
-	}
-
-    if (m_pMeasureData != nullptr && pEnd == pStart) {
-        m_pMeasureData->setCurrentPoint(pStart);
-        nmDataAttribute lenAttr = m_pMeasureData->getLength();
-		lenAttr.setValue(dLength);
-        m_pMeasureData->setLength(lenAttr);
+	if (m_pGraphicBinder) {
+		m_pGraphicBinder->createMeasureForGraphic(this);
 	}
 	this->setLockPos(true);
 	this->setReadOnly(true);
 }
 
+void nmObjLineMeasure::removeData() {
+	if (m_pGraphicBinder) {
+		m_pGraphicBinder->removeMeasureBinding(this);
+	}
+}
+
 void nmObjLineMeasure::onSerialize(ZxSerializer* ser) {
 	nmObjLine::onSerialize(ser);
 	ser->write("Length", m_dLength);
diff --git a/Src/nmNum/nmPlot/nmPlotGraphicBinder.cpp b/Src/nmNum/nmPlot/nmPlotGraphicBinder.cpp
index 3f773c8..f67ac96 100644
--- a/Src/nmNum/nmPlot/nmPlotGraphicBinder.cpp
+++ b/Src/nmNum/nmPlot/nmPlotGraphicBinder.cpp
@@ -8,6 +8,8 @@
 #include "nmObjRectOutline.h"
 #include "nmObjPolygonOutline.h"
 #include "nmDataOutline.h"
+#include "nmObjLineMeasure.h"
+#include "nmDataMeasure.h"
 #include "nmObjBase.h"
 #include "nmDataAnalyzeManager.h"
 
@@ -98,6 +100,7 @@ void nmPlotGraphicBinder::updateDataMgr(nmDataAnalyzeManager* pDataMgr)
 	m_setBoundCrackGraphics.clear();
 	m_mapOutlineData.clear();
 	m_setBoundOutlineGraphics.clear();
+	m_mapMeasureData.clear();
 	m_pDataMgr = pDataMgr;
 }
 
@@ -767,3 +770,72 @@ void nmPlotGraphicBinder::onGraphicOutlineVisibleChanged(bool bVisible)
 		m_pDataMgr->notifyDataChanged();
 	}
 }
+
+// 用户画完测量线后：获取数据对象并建立绑定
+void nmPlotGraphicBinder::createMeasureForGraphic(nmObjLineMeasure* pGraphic)
+{
+	if (!pGraphic || !m_pDataMgr) {
+		return;
+	}
+
+	// 获取测量数据单例
+	nmDataMeasure* pData = m_pDataMgr->getMeasureData();
+
+	// 将图元坐标推入数据
+	QVector<QPointF> pts = pGraphic->getAllValues();
+	if (pts.count() >= 2) {
+		QPointF pStart = pts[0];
+		QPointF pEnd = pts[1];
+		double dLength = QLineF(pStart, pEnd).length();
+		if (pEnd != pStart) {
+			pData->setStartPoint(pStart);
+			pData->setEndPoint(pEnd);
+		} else {
+			pData->setCurrentPoint(pStart);
+		}
+		nmDataAttribute lenAttr = pData->getLength();
+		lenAttr.setValue(dLength);
+		pData->setLength(lenAttr);
+	}
+
+	// 建立映射
+	m_mapMeasureData[pGraphic] = pData;
+	pGraphic->setGraphicBinder(this);
+
+	m_pDataMgr->notifyDataChanged();
+}
+
+// 删除测量线图元：移除映射（不删除数据对象，由 DataManager 管理）
+void nmPlotGraphicBinder::removeMeasureBinding(nmObjLineMeasure* pGraphic)
+{
+	if (!pGraphic) {
+		return;
+	}
+
+	m_mapMeasureData.remove(pGraphic);
+}
+
+// 坐标同步：从数据对象读取起点终点，写回图元（拟合功能修改数据后由 paintBack 调用）
+void nmPlotGraphicBinder::syncMeasurePoints(nmObjLineMeasure* pGraphic)
+{
+	if (!pGraphic || !m_pDataMgr) return;
+
+	nmDataMeasure* pData = m_mapMeasureData.value(pGraphic, nullptr);
+	if (!pData) return;
+
+	QPointF startPt = pData->getStartPoint();
+	QPointF endPt = pData->getEndPoint();
+
+	// 仅在坐标确实变化时才更新，避免每次绘制都无谓写入
+	QVector<QPointF> currentPts = pGraphic->getAllValues();
+	if (currentPts.count() >= 2 &&
+		currentPts[0] == startPt && currentPts[1] == endPt) {
+		return;
+	}
+
+	pGraphic->blockSignals(true);
+	QVector<QPointF> pts;
+	pts << startPt << endPt;
+	pGraphic->setAllValues(pts);
+	pGraphic->blockSignals(false);
+}