diff --git a/DungeonShooting_Godot/prefab/ui/TileSetEditorCombination.tscn b/DungeonShooting_Godot/prefab/ui/TileSetEditorCombination.tscn
index c4f6702..4f906ac 100644
--- a/DungeonShooting_Godot/prefab/ui/TileSetEditorCombination.tscn
+++ b/DungeonShooting_Godot/prefab/ui/TileSetEditorCombination.tscn
@@ -52,7 +52,7 @@
 [node name="LeftTop" type="Panel" parent="HSplitContainer/VSplitContainer"]
 layout_mode = 2
 size_flags_vertical = 3
-size_flags_stretch_ratio = 31.0
+size_flags_stretch_ratio = 40.0
 
 [node name="MarginContainer" type="MarginContainer" parent="HSplitContainer/VSplitContainer/LeftTop"]
 layout_mode = 1
@@ -90,6 +90,7 @@
 mouse_filter = 2
 
 [node name="BrushRoot" type="Node2D" parent="HSplitContainer/VSplitContainer/LeftTop/MarginContainer/LeftTopBg/CombinationRoot"]
+z_index = 1
 
 [node name="Grid" type="ColorRect" parent="HSplitContainer/VSplitContainer/LeftTop/MarginContainer/LeftTopBg"]
 material = SubResource("ShaderMaterial_df7va")
@@ -105,7 +106,7 @@
 layout_mode = 2
 size_flags_horizontal = 3
 size_flags_vertical = 3
-size_flags_stretch_ratio = 68.0
+size_flags_stretch_ratio = 60.0
 
 [node name="MarginContainer" type="MarginContainer" parent="HSplitContainer/VSplitContainer/LeftBottom"]
 layout_mode = 1
diff --git a/DungeonShooting_Godot/src/game/event/EventEnum.cs b/DungeonShooting_Godot/src/game/event/EventEnum.cs
index 7cab6b1..b133ecd 100644
--- a/DungeonShooting_Godot/src/game/event/EventEnum.cs
+++ b/DungeonShooting_Godot/src/game/event/EventEnum.cs
@@ -159,9 +159,9 @@
     /// <summary>
     /// 选中组合模式下的Cell图块, 参数为<see cref="Godot.Vector2I"/>
     /// </summary>
-    OnSelectContainerCell,
+    OnSelectCombinationCell,
     /// <summary>
     /// 清除组合模式下的Cell图块
     /// </summary>
-    OnClearContainerCell,
+    OnClearCombinationCell,
 }
diff --git a/DungeonShooting_Godot/src/game/ui/tileSetEditorCombination/leftBottom/TileEditArea.cs b/DungeonShooting_Godot/src/game/ui/tileSetEditorCombination/leftBottom/TileEditArea.cs
index 47c6b9c..ec72cdd 100644
--- a/DungeonShooting_Godot/src/game/ui/tileSetEditorCombination/leftBottom/TileEditArea.cs
+++ b/DungeonShooting_Godot/src/game/ui/tileSetEditorCombination/leftBottom/TileEditArea.cs
@@ -68,7 +68,7 @@
                 _useMask.Add(cell);
                 uiCell.SetData(true);
                 
-                EventManager.EmitEvent(EventEnum.OnSelectContainerCell, cell);
+                EventManager.EmitEvent(EventEnum.OnSelectCombinationCell, cell);
             }
         }
     }
@@ -89,7 +89,7 @@
             }
         }
         
-        EventManager.EmitEvent(EventEnum.OnClearContainerCell);
+        EventManager.EmitEvent(EventEnum.OnClearCombinationCell);
     }
 
     /// <summary>
diff --git a/DungeonShooting_Godot/src/game/ui/tileSetEditorCombination/leftTop/CombinationCell.cs b/DungeonShooting_Godot/src/game/ui/tileSetEditorCombination/leftTop/CombinationCell.cs
index 9bb9880..416235d 100644
--- a/DungeonShooting_Godot/src/game/ui/tileSetEditorCombination/leftTop/CombinationCell.cs
+++ b/DungeonShooting_Godot/src/game/ui/tileSetEditorCombination/leftTop/CombinationCell.cs
@@ -18,4 +18,13 @@
         Texture = texture;
         RegionRect = new Rect2(texturePos * GameConfig.TileCellSize, GameConfig.TileCellSizeVector2I);
     }
+
+    /// <summary>
+    /// 从指定的组合单元克隆数据
+    /// </summary>
+    public void CloneFrom(CombinationCell combinationCell)
+    {
+        Texture = combinationCell.Texture;
+        RegionRect = combinationCell.RegionRect;
+    }
 }
\ No newline at end of file
diff --git a/DungeonShooting_Godot/src/game/ui/tileSetEditorCombination/leftTop/TileEditCombination.cs b/DungeonShooting_Godot/src/game/ui/tileSetEditorCombination/leftTop/TileEditCombination.cs
index 053a89d..9fc4298 100644
--- a/DungeonShooting_Godot/src/game/ui/tileSetEditorCombination/leftTop/TileEditCombination.cs
+++ b/DungeonShooting_Godot/src/game/ui/tileSetEditorCombination/leftTop/TileEditCombination.cs
@@ -5,13 +5,20 @@
 
 public partial class TileEditCombination : GridBg<TileSetEditorCombination.LeftTopBg>
 {
-    //kay: 代表原图中的坐标
+    //kay: 代表原图中的坐标, 单位: 格
     private Dictionary<Vector2I, CombinationCell> _brushData = new Dictionary<Vector2I, CombinationCell>();
+    //笔刷偏移, 单位: 像素
     private Vector2I _brushOffset = Vector2I.Zero;
-    private int _xStart = 0;
-    private int _yStart = 0;
-    private int _xEnd = 0;
-    private int _yEnd = 0;
+    //上一帧笔刷位置
+    private Vector2 _brushPrevPos = Vector2.Zero;
+    private bool _initBrush = false;
+    private bool _drawBrushFlag = false;
+    private int _xStart = int.MaxValue;
+    private int _yStart = int.MaxValue;
+    private int _xEnd = int.MinValue;
+    private int _yEnd = int.MinValue;
+
+    private Dictionary<Vector2I, CombinationCell> _canvas = new Dictionary<Vector2I, CombinationCell>();
     
     public override void SetUiNode(IUiNode uiNode)
     {
@@ -19,8 +26,8 @@
         Grid = UiNode.L_Grid.Instance;
         ContainerRoot = UiNode.L_CombinationRoot.Instance;
         
-        UiNode.UiPanel.AddEventListener(EventEnum.OnSelectContainerCell, OnSelectContainerCell);
-        UiNode.UiPanel.AddEventListener(EventEnum.OnClearContainerCell, OnClearContainerCell);
+        UiNode.UiPanel.AddEventListener(EventEnum.OnSelectCombinationCell, OnSelectCombinationCell);
+        UiNode.UiPanel.AddEventListener(EventEnum.OnClearCombinationCell, OnClearCombinationCell);
     }
 
     public override void _Process(double delta)
@@ -30,37 +37,83 @@
             return;
         }
 
-        UiNode.L_CombinationRoot.L_BrushRoot.Instance.Position = UiNode.L_CombinationRoot.Instance
-            .GetLocalMousePosition().FloorAdsorption(GameConfig.TileCellSizeVector2I);
+        var brushRoot = UiNode.L_CombinationRoot.L_BrushRoot.Instance;
+        var combinationRoot = UiNode.L_CombinationRoot.Instance;
+        Vector2 newPos = combinationRoot.GetLocalMousePosition().FloorAdsorption(GameConfig.TileCellSizeVector2I) + _brushOffset;
+        brushRoot.Position = newPos;
+
+        //左键按下开始绘制
+        if (_initBrush && Input.IsMouseButtonPressed(MouseButton.Left) && this.IsMouseInRect())
+        {
+            if (_brushPrevPos != newPos || !_drawBrushFlag)
+            {
+                _drawBrushFlag = true;
+                _brushPrevPos = newPos;
+                DrawBrush();
+            }
+        }
+        else
+        {
+            _drawBrushFlag = false;
+        }
+    }
+    
+    //绘制笔刷
+    private void DrawBrush()
+    {
+        var brushRoot = UiNode.L_CombinationRoot.L_BrushRoot.Instance;
+        foreach (var keyValuePair in _brushData)
+        {
+            var combinationCell = keyValuePair.Value;
+            var pos = (combinationCell.Position + brushRoot.Position).AsVector2I();
+            if (_canvas.TryGetValue(pos, out var canvasCell))
+            {
+                canvasCell.CloneFrom(combinationCell);
+            }
+            else
+            {
+                canvasCell = (CombinationCell)combinationCell.Duplicate();
+                canvasCell.Position = pos;
+                UiNode.L_CombinationRoot.AddChild(canvasCell);
+                _canvas.Add(pos, canvasCell);
+            }
+        }
     }
 
-    private void OnSelectContainerCell(object obj)
+    //选中组合的图块
+    private void OnSelectCombinationCell(object obj)
     {
         if (obj is Vector2I cell && !_brushData.ContainsKey(cell))
         {
+            _initBrush = true;
             var cellData = new CombinationCell();
-            var pos = cell * GameConfig.TileCellSize + _brushOffset;
-            cellData.Position = pos;
+            cellData.Position = cell * GameConfig.TileCellSize;
             cellData.InitData(UiNode.UiPanel.EditorPanel.Texture, cell);
             UiNode.L_CombinationRoot.L_BrushRoot.AddChild(cellData);
             _brushData.Add(cell, cellData);
             
             //计算起始点和终点
-            //if (pos.X < _xStart || pos.X > _xEnd || pos.) 
+            _xStart = Mathf.Min(cell.X, _xStart);
+            _yStart = Mathf.Min(cell.Y, _yStart);
+            _xEnd = Mathf.Max(cell.X, _xEnd);
+            _yEnd = Mathf.Max(cell.Y, _yEnd);
+            _brushOffset = new Vector2I(-(_xStart + (_xEnd - _xStart) / 2), -(_yStart + (_yEnd - _yStart) / 2)) * GameConfig.TileCellSize;
         }
     }
     
-    private void OnClearContainerCell(object obj)
+    //移除组合图块
+    private void OnClearCombinationCell(object obj)
     {
         foreach (var keyValuePair in _brushData)
         {
             keyValuePair.Value.QueueFree();
         }
         _brushData.Clear();
+        _initBrush = false;
         _brushOffset = Vector2I.Zero;
-        _xStart = 0;
-        _yStart = 0;
-        _xEnd = 0;
-        _yEnd = 0;
+        _xStart = int.MaxValue;
+        _yStart = int.MaxValue;
+        _xEnd = int.MinValue;
+        _yEnd = int.MinValue;
     }
 }
\ No newline at end of file