diff --git a/tabwidget.cpp b/tabwidget.cpp
index 09da450..1a36f50 100644
--- a/tabwidget.cpp
+++ b/tabwidget.cpp
@@ -42,6 +42,9 @@ int TabWidget::newDocument()
     SciEdit *editor = createEditor();
     m_editors[docId] = editor;
     
+    // 连接信号
+    connectEditorSignals(editor);
+    
     QString title = m_documentManager->getDocumentTitle(docId);
     int tabIndex = addTab(editor, title);
     
@@ -64,10 +67,16 @@ int TabWidget::openDocument(const QString &filePath)
     SciEdit *editor = createEditor();
     m_editors[docId] = editor;
     
+    // 临时断开信号连接，避免setText触发textChanged导致文档被标记为已修改
+    disconnectEditorSignals(editor);
+    
     // 设置编辑器内容
     QString content = m_documentManager->getDocumentContent(docId);
     editor->setText(content.toUtf8().constData());
     
+    // 重新连接信号
+    connectEditorSignals(editor);
+    
     QString title = m_documentManager->getDocumentTitle(docId);
     int tabIndex = addTab(editor, title);
     
@@ -340,7 +349,6 @@ void TabWidget::onEditorTextChanged()
 SciEdit *TabWidget::createEditor()
 {
     SciEdit *editor = new SciEdit(this);
-    connectEditorSignals(editor);
     return editor;
 }