diff --git a/src/Add-on/Join.ts b/src/Add-on/Join.ts
index b5fe901ce..57a7e69bc 100644
--- a/src/Add-on/Join.ts
+++ b/src/Add-on/Join.ts
@@ -3,6 +3,7 @@ import { app } from "../ApplicationServices/Application";
 import { curveLinkGroup } from "../Common/CurveUtils";
 import { Status } from "../Common/Status";
 import { Arc } from "../DatabaseServices/Arc";
+import { Board, BoardType } from "../DatabaseServices/Board";
 import { Circle } from "../DatabaseServices/Circle";
 import { Curve } from '../DatabaseServices/Curve';
 import { Line } from "../DatabaseServices/Line";
@@ -16,11 +17,23 @@ export class Command_Join implements Command
 {
     async exec()
     {
-        let exSsRes = await app.m_Editor.GetSelection({ Msg: "请选择对象<全部选择>:", UseSelect: true, Filter: { filterTypes: [Curve] } });
+        let exSsRes = await app.m_Editor.GetSelection({ Msg: "请选择对象<全部选择>:", UseSelect: true, Filter: { filterTypes: [Curve, Board] } });
         if (exSsRes.Status === PromptStatus.Cancel)
             return;
 
-        let curveCol = exSsRes.SelectSet.SelectEntityList as Curve[];
+        let curveCol: Curve[] = [];
+        let brs: Board[] = [];
+        for (let en of exSsRes.SelectSet.SelectEntityList)
+        {
+            if (en instanceof Curve)
+                curveCol.push(en)
+            else if (en instanceof Board)
+                brs.push(en)
+        }
+
+        if (brs.length > 1)
+            this.MergeBoards(brs);
+
         let typeMap = new Map<string, Curve[]>();
         for (let cu of curveCol)
         {
@@ -179,4 +192,50 @@ export class Command_Join implements Command
             }
         }
     }
+    private MergeBoards(brs: Board[])
+    {
+        let brMap: Map<BoardType, Board[]> = new Map();
+        if (brs.length > 0)
+        {
+            for (let br of brs)
+            {
+                let brs = brMap.get(br.BoardType);
+                if (brs)
+                    brs.push(br);
+                else
+                    brMap.set(br.BoardType, [br]);
+            }
+        }
+        for (let [, bs] of brMap)
+        {
+            this.JoinSameTypeBrs(bs);
+        }
+    }
+    private JoinSameTypeBrs(brs: Board[])
+    {
+        while (brs.length > 0)
+        {
+            let br = brs.shift();//取第一个
+
+            while (brs.length > 0)
+            {
+                //剩余的 无法合并的板件
+                let remBrs = brs.filter(b =>
+                {
+                    let isSuccess = br.Join(b);
+                    if (isSuccess)
+                    {
+                        b.Erase();
+                        return false;
+                    }
+                    return true;
+                });
+
+                if (remBrs.length === brs.length)
+                    break;//退出循环.下一个
+                else
+                    brs = remBrs; //更新为剩下的板件列表
+            }
+        }
+    }
 } 
diff --git a/src/DatabaseServices/Board.ts b/src/DatabaseServices/Board.ts
index cf3808357..2403b717d 100644
--- a/src/DatabaseServices/Board.ts
+++ b/src/DatabaseServices/Board.ts
@@ -4,7 +4,7 @@ import { arrayRemoveIf } from '../Common/ArrayExt';
 import { UpdateDraw } from '../Common/Status';
 import { ObjectSnapMode } from '../Editor/ObjectSnapMode';
 import { Box3Ext } from '../Geometry/Box';
-import { equaln, equalv3, MoveMatrix, rotatePoint, cZeroVec } from '../Geometry/GeUtils';
+import { equaln, equalv3, MoveMatrix, rotatePoint, cZeroVec, isParallelTo } from '../Geometry/GeUtils';
 import ThreeBSP from '../Geometry/ThreeCSG';
 import { RenderType } from '../GraphicsSystem/RenderType';
 import { BoardProcessOption, ComposingType, DrillType, LinesType, PXLFaceType } from '../UI/Store/BoardInterface';
@@ -414,7 +414,33 @@ export class Board extends Entity
     {
         return this.m_Shape.Explode().map(cu => cu.ApplyMatrix(this.OCS));
     }
+    Join(target: this): boolean
+    {
+        if (equaln(this.m_Thickness, target.m_Thickness)
+            && isParallelTo(this.Normal, target.Normal)
+            && this.IsCoplaneTo(target))
+        {
+            this.WriteAllObjectRecord();
+            let cloneTar = target.Clone();
+            let mat = this.OCSInv.multiply(target.OCS)
+            cloneTar.m_Shape.ApplyMatrix(mat);
 
+            let shapes = this.m_Shape.UnionBoolOperation(cloneTar.m_Shape);
+            if (shapes.length === 1)
+            {
+                cloneTar.m_BoardModeling.forEach(m =>
+                {
+                    m.shape.ApplyMatrix(mat);
+                });
+
+                this.m_BoardModeling.push(...cloneTar.m_BoardModeling);
+                this.Shape = shapes[0];
+                this.UpdateOutlineShape();
+                return true;
+            }
+        }
+        return false;
+    }
     RotateBoard(rox: number, roy: number, roz: number)
     {
         this.WriteAllObjectRecord();
@@ -689,7 +715,6 @@ export class Board extends Entity
     private UpdateBoardShape()
     {
         let deleteModel: Set<IModeling> = new Set();
-
         for (let m of this.m_BoardModeling)
         {
             let shapeZ = m.shape.Outline.Curve.Position.z;
@@ -733,6 +758,10 @@ export class Board extends Entity
 
         arrayRemoveIf(this.m_BoardModeling, m => deleteModel.has(m));
 
+        this.UpdateOutlineShape();
+    }
+    private UpdateOutlineShape()
+    {
         //源形状min应在0点
         let min = this.m_Shape.BoundingBox.min;
         if (!equalv3(min, new Vector3()))
@@ -746,8 +775,8 @@ export class Board extends Entity
 
             this.ApplyMatrix(
                 MoveMatrix(min.applyMatrix4(new Matrix4().extractRotation(this.OCS))));
+            this.Update(UpdateDraw.Geometry);
         }
-
     }
     InitDrawObject(renderType: RenderType = RenderType.Wireframe): Object3D
     {