diff --git a/include/mainScene.h b/include/mainScene.h
index c5d3be6..91dff7f 100644
--- a/include/mainScene.h
+++ b/include/mainScene.h
@@ -45,9 +45,15 @@ public:
      * 构造函数，同时生成站点
      * @param stop_node_number 站点的数量
      */
-    explicit SceneManager(int stop_node_number);
+    explicit SceneManager();
     ~SceneManager();
 
+    /**
+     * 生成站点画面
+     * @param node_number
+     */
+    void SetStopScene(int node_number);
+
 private:
     /**
      * 显示站点的像素图对象
@@ -58,7 +64,21 @@ private:
      */
     PosPair *stop_pos_pairs;
 
+    /**
+     * 总共的站点数量
+     */
+    int stop_node_number;
+
+    /**
+     * 一个矩形的边框
+     * 使无论中间存在多少站点，这个scene都能在view的中心
+     */
     QGraphicsRectItem *rect_item;
+
+    /**
+     * 清除画面
+     */
+    void ClearScene();
 };
 
 #endif //AUTO_BUS_GUI_MAIN_SCENE_H
diff --git a/src/busModel.cpp b/src/busModel.cpp
index 279620b..fd14875 100644
--- a/src/busModel.cpp
+++ b/src/busModel.cpp
@@ -304,11 +304,11 @@ void BusControllerModel::ReadConfigFile(const std::string& file_name)
         chosen_strategy = BUS_FCFS;
     }
 
-    qDebug() << node_space_length << total_station;
     // 得到轨道的总长度
     total_distance = node_space_length * total_station;
     rail_manager->CreateRails(node_space_length, total_station);
 
+    // 发射信号说明创建完毕
     emit RailsCreated(total_station);
 }
 
diff --git a/src/centralwidget.cpp b/src/centralwidget.cpp
index e214b5f..3c35b9c 100644
--- a/src/centralwidget.cpp
+++ b/src/centralwidget.cpp
@@ -11,7 +11,7 @@
 CentralWidget::CentralWidget(QWidget *parent, BusControllerModel *bus_controller) : QWidget(parent), ui(new Ui::CentralWidget)
 {
     ui->setupUi(this);
-    scene_manager = new SceneManager(20);
+    scene_manager = new SceneManager;
 
     ui->main_canva->setScene(scene_manager->scene);
 
@@ -32,7 +32,9 @@ CentralWidget::~CentralWidget()
 
 void CentralWidget::SetControlConnection()
 {
-
+    // 处理轨道重新设置事件
+    QObject::connect(controller, &BusControllerModel::RailsCreated,
+                     this, &CentralWidget::SetRailsScene);
 }
 
 void CentralWidget::SetWidgetConnection()
@@ -96,4 +98,21 @@ void CentralWidget::DeleteQueryItem(int query_id)
 void CentralWidget::AddQueryButtonClicked()
 {
 
+}
+
+void CentralWidget::SetRailsScene(int node_num)
+{
+    scene_manager->SetStopScene(node_num);
+    SetRailsComboBox(node_num);
+}
+
+void CentralWidget::SetRailsComboBox(int node_num)
+{
+    ui->query_node_combo->clear();
+
+    for(int i = 1; i <= node_num; i++)
+    {
+        QString node_str = QString::asprintf("第%d站", i);
+        ui->query_node_combo->addItem(node_str);
+    }
 }
\ No newline at end of file
diff --git a/src/header/centralwidget.h b/src/header/centralwidget.h
index e16c753..8ad11b6 100644
--- a/src/header/centralwidget.h
+++ b/src/header/centralwidget.h
@@ -49,6 +49,14 @@ public slots:
      */
     void AddQueryButtonClicked();
 
+    /**
+     * 处理轨道重新生成的槽函数
+     * 重绘轨道画面
+     * 重新设置站点选择下拉栏
+     * @param node_num
+     */
+    void SetRailsScene(int node_num);
+
 private:
     /**
      * UI控件
@@ -90,6 +98,11 @@ private:
      * 清除展示对象占用的内存空间
      */
     void DeleteQueryList();
+
+    /**
+     * 设置站点选择下拉栏
+     */
+    void SetRailsComboBox(int node_num);
 };
 
 
diff --git a/src/mainScene.cpp b/src/mainScene.cpp
index bc4c852..1dc2a45 100644
--- a/src/mainScene.cpp
+++ b/src/mainScene.cpp
@@ -4,12 +4,33 @@
 
 #include "mainScene.h"
 
-SceneManager::SceneManager(int stop_node_number)
+SceneManager::SceneManager()
 {
     scene = new QGraphicsScene;
+    stop_node_number = 0;
+    pixmap_items = nullptr;
+    stop_pos_pairs = nullptr;
+    rect_item = new QGraphicsRectItem;
+
+    // 画一个描边的矩形框
+    rect_item->setRect(0, 0, 595, 395);
+    scene->addItem(rect_item);
+}
+
+SceneManager::~SceneManager()
+{
+    ClearScene();
+    delete scene;
+}
+
+void SceneManager::SetStopScene(int node_number)
+{
+    // 先清除以下屏幕
+    ClearScene();
+
+    stop_node_number = node_number;
     pixmap_items = new QGraphicsPixmapItem[stop_node_number];
     stop_pos_pairs = new PosPair[stop_node_number];
-    rect_item = new QGraphicsRectItem;
 
     int stop_space_length = stop_pos_pairs->GetStopSpaceLength(stop_node_number);
     double stop_scale = 0.15;
@@ -36,17 +57,18 @@ SceneManager::SceneManager(int stop_node_number)
         }
         pixmap_items[i].setPos(stop_pos_pairs[i].pos_x, stop_pos_pairs[i].pos_y);
     }
-
-    // 画一个描边的矩形框
-    rect_item->setRect(0, 0, 595, 395);
-    scene->addItem(rect_item);
 }
 
-SceneManager::~SceneManager()
+void SceneManager::ClearScene()
 {
-    delete []stop_pos_pairs;
+    // 从画布中移除所有的站点图片
+    for(int i = 0; i < stop_node_number; i++)
+    {
+        scene->removeItem(&pixmap_items[i]);
+    }
+
     delete []pixmap_items;
-    delete scene;
+    delete []stop_pos_pairs;
 }
 
 PosPair::PosPair()
@@ -85,7 +107,7 @@ void PosPair::AddLength(int length)
         // 站点在右轨道
 
         pos_x = stop_begin_x + stop_rail_width;
-        pos_y = stop_begin_y + stop_rail_width + stop_rail_height - distance;
+        pos_y = stop_begin_y + distance - stop_rail_width;
     }
     else
     {
diff --git a/src/railsModel.cpp b/src/railsModel.cpp
index 283e002..12f9a30 100644
--- a/src/railsModel.cpp
+++ b/src/railsModel.cpp
@@ -12,7 +12,10 @@ RailsModel::RailsModel()
 
 RailsModel::~RailsModel()
 {
-    FreeRails();
+    if(rails != nullptr)
+    {
+        FreeRails();
+    }
 }
 
 rail_node_t *RailsModel::FindNode(int node_num) const