diff --git a/Include/nmNum/nmSubWxs/nmWxAutomaticFitting.h b/Include/nmNum/nmSubWxs/nmWxAutomaticFitting.h
index 56e21a2..9e525e5 100644
--- a/Include/nmNum/nmSubWxs/nmWxAutomaticFitting.h
+++ b/Include/nmNum/nmSubWxs/nmWxAutomaticFitting.h
@@ -40,6 +40,7 @@ public:
 		void onAccept();
 		void onReject();
 		void onWellSelected(int index);
+		void onAlgorithmChanged(int index);
 		void onParameterTableItemChanged(QTableWidgetItem* item);
 
 		// 自动拟合相关槽函数
@@ -81,6 +82,7 @@ private:
 	QLineEdit* m_errorLimitEdit;
 	QComboBox* m_targetWellCombo;
 	QComboBox* m_algorithmCombo;
+	QLabel* m_surrogateLabel;
 	QComboBox* m_surrogateCombo;
 
 	// 参数复选框
diff --git a/Src/nmNum/nmSubWxs/nmWxAutomaticFitting.cpp b/Src/nmNum/nmSubWxs/nmWxAutomaticFitting.cpp
index 492544d..449f425 100644
--- a/Src/nmNum/nmSubWxs/nmWxAutomaticFitting.cpp
+++ b/Src/nmNum/nmSubWxs/nmWxAutomaticFitting.cpp
@@ -817,14 +817,15 @@ void nmWxAutomaticFitting::setupControlPanel()
 	m_algorithmCombo->setMaximumWidth(160);
 	m_algorithmCombo->setMinimumWidth(160);
 
-	QLabel* surrogateLabel = new QLabel(tr("PSO acceleration:"));
+	m_surrogateLabel = new QLabel(tr("PSO acceleration:"));
 	m_surrogateCombo = new QComboBox();
-	//m_surrogateCombo->setEnabled(false);// 暂时不可编辑
 	m_surrogateCombo->addItem(tr("Off"));
 	m_surrogateCombo->addItem(tr("On"));
 	m_surrogateCombo->setCurrentIndex(automaticFittingData.getSurrogateScreeningEnabled() ? 1 : 0);
 	m_surrogateCombo->setMaximumWidth(160);
 	m_surrogateCombo->setMinimumWidth(160);
+	connect(m_algorithmCombo, SIGNAL(currentIndexChanged(int)), this, SLOT(onAlgorithmChanged(int)));
+	onAlgorithmChanged(m_algorithmCombo->currentIndex());
 
 	// 迭代次数
 	QLabel* iterationLabel = new QLabel(tr("Number of iterations:"));
@@ -876,7 +877,7 @@ void nmWxAutomaticFitting::setupControlPanel()
 	m_controlLayout->addWidget(m_algorithmCombo);
 	m_controlLayout->addSpacing(15);
 
-	m_controlLayout->addWidget(surrogateLabel);
+	m_controlLayout->addWidget(m_surrogateLabel);
 	m_controlLayout->addWidget(m_surrogateCombo);
 	m_controlLayout->addSpacing(15);
 
@@ -895,6 +896,14 @@ void nmWxAutomaticFitting::setupControlPanel()
 	m_controlLayout->addStretch(1);
 }
 
+void nmWxAutomaticFitting::onAlgorithmChanged(int index)
+{
+	// LM 不使用 PSO 加速；只切换可用状态，保留切回 PSO 时的原选择。
+	const bool usePSO = (index == 0);
+	m_surrogateLabel->setEnabled(usePSO);
+	m_surrogateCombo->setEnabled(usePSO);
+}
+
 void nmWxAutomaticFitting::setupButtons()
 {
 	QHBoxLayout* buttonLayout = new QHBoxLayout();