diff --git a/src/app/CMakeLists.txt b/src/app/CMakeLists.txt
index 2d06c4a..df7e512 100644
--- a/src/app/CMakeLists.txt
+++ b/src/app/CMakeLists.txt
@@ -53,6 +53,7 @@ add_executable(geopro_desktop WIN32
   panels/columns/Column2DDataset.cpp
   panels/columns/Column3DDataset.cpp
   panels/columns/Column3DAnalysis.cpp
+  panels/columns/ColumnDrawer.cpp
   panels/AnomalyTablePanel.cpp
   panels/LoadingOverlay.cpp
   panels/DatasetDetailPage.cpp
diff --git a/src/app/panels/columns/ColumnDrawer.cpp b/src/app/panels/columns/ColumnDrawer.cpp
new file mode 100644
index 0000000..0479003
--- /dev/null
+++ b/src/app/panels/columns/ColumnDrawer.cpp
@@ -0,0 +1,52 @@
+#include "panels/columns/ColumnDrawer.hpp"
+#include "panels/columns/Column3DDataset.hpp"
+#include "panels/columns/Column2DDataset.hpp"
+#include "panels/columns/Column3DAnalysis.hpp"
+#include <QHBoxLayout>
+#include <QPushButton>
+#include <QTabWidget>
+
+namespace geopro::app {
+
+ColumnDrawer::ColumnDrawer(QWidget* parent)
+    : QWidget(parent)
+{
+    // 创建三个栏
+    col3D_      = new Column3DDataset(this);
+    col2D_      = new Column2DDataset(this);
+    colAnalysis_ = new Column3DAnalysis(this);
+
+    // Tab 容器（body_）
+    auto* tabs = new QTabWidget(this);
+    body_ = tabs;
+    tabs->addTab(col3D_,       QStringLiteral("三维数据集"));
+    tabs->addTab(col2D_,       QStringLiteral("二维数据集"));
+    tabs->addTab(colAnalysis_, QStringLiteral("三维分析"));
+
+    // 折叠按钮：固定宽 16px，垂直拉伸
+    toggleBtn_ = new QPushButton(QStringLiteral("◀"), this);
+    toggleBtn_->setFixedWidth(16);
+    toggleBtn_->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Expanding);
+    connect(toggleBtn_, &QPushButton::clicked, this, &ColumnDrawer::toggleCollapsed);
+
+    // 根布局：[body_ | toggleBtn_]，无边距
+    auto* root = new QHBoxLayout(this);
+    root->setContentsMargins(0, 0, 0, 0);
+    root->setSpacing(0);
+    root->addWidget(body_, 1);
+    root->addWidget(toggleBtn_, 0);
+
+    // 展开时限宽 ~316px (300 body + 16 btn)
+    setMaximumWidth(316);
+}
+
+void ColumnDrawer::toggleCollapsed()
+{
+    collapsed_ = !collapsed_;
+    body_->setVisible(!collapsed_);
+    toggleBtn_->setText(collapsed_ ? QStringLiteral("▶") : QStringLiteral("◀"));
+    // 折叠后只保留按钮宽度；展开恢复上限
+    setMaximumWidth(collapsed_ ? 16 : 316);
+}
+
+}  // namespace geopro::app
diff --git a/src/app/panels/columns/ColumnDrawer.hpp b/src/app/panels/columns/ColumnDrawer.hpp
new file mode 100644
index 0000000..d45c84d
--- /dev/null
+++ b/src/app/panels/columns/ColumnDrawer.hpp
@@ -0,0 +1,34 @@
+#pragma once
+#include <QWidget>
+
+class QPushButton;
+
+namespace geopro::app {
+
+class Column3DDataset;
+class Column2DDataset;
+class Column3DAnalysis;
+
+// VTK视图左侧内嵌抽屉：三 tab(三维数据集/二维数据集/三维分析) + 折叠开关。
+class ColumnDrawer : public QWidget {
+    Q_OBJECT
+public:
+    explicit ColumnDrawer(QWidget* parent = nullptr);
+
+    Column3DDataset* col3D() const { return col3D_; }
+    Column2DDataset* col2D() const { return col2D_; }
+    Column3DAnalysis* colAnalysis() const { return colAnalysis_; }
+
+public slots:
+    void toggleCollapsed();
+
+private:
+    Column3DDataset* col3D_ = nullptr;
+    Column2DDataset* col2D_ = nullptr;
+    Column3DAnalysis* colAnalysis_ = nullptr;
+    QWidget* body_ = nullptr;   // QTabWidget，折叠时隐藏
+    QPushButton* toggleBtn_ = nullptr;
+    bool collapsed_ = false;
+};
+
+}  // namespace geopro::app