diff --git a/__test__/Polyline/split.test.ts b/__test__/Polyline/split.test.ts
index 484cd2255..a39bab0bc 100644
--- a/__test__/Polyline/split.test.ts
+++ b/__test__/Polyline/split.test.ts
@@ -113,7 +113,7 @@ function createTestPolyline(): Polyline
 test('切割点在尾部', () =>
 {
     let pl = new Polyline();
-    pl.Create2Pt(new Vector3(), new Vector3(100, 100));
+    pl.Rectangle(100, 100);
     let cus = pl.GetSplitCurves([1, 4]);
     expect(cus.length).toBe(2);
 
diff --git a/src/Add-on/BoardEditor/Board2Regions.ts b/src/Add-on/BoardEditor/Board2Regions.ts
index 4ca1c0a30..5a153461b 100644
--- a/src/Add-on/BoardEditor/Board2Regions.ts
+++ b/src/Add-on/BoardEditor/Board2Regions.ts
@@ -35,7 +35,7 @@ export function Board2Regions(br: Board): Region[]
 
     for (let l of lines)
     {
-        let rectPl = new Polyline().Create2Pt(ZeroVec, new Vector3(l.Length, br.Thickness));
+        let rectPl = new Polyline().Rectangle(l.Length, br.Thickness);
         let reg = Region.CreateFromCurves([rectPl]);
 
         let p = l.StartPoint.applyMatrix4(ocs);
diff --git a/src/Add-on/DrawRect.ts b/src/Add-on/DrawRect.ts
index b635e8ead..3ad2c536f 100644
--- a/src/Add-on/DrawRect.ts
+++ b/src/Add-on/DrawRect.ts
@@ -12,7 +12,7 @@ export class DrawRect implements Command
         if (rectRes.Status === PromptStatus.OK)
         {
             let rec = new Polyline();
-            rec.Create2Pt(rectRes.Point1UCS, rectRes.Point2UCS);
+            rec.RectangleFrom2Pt(rectRes.Point1UCS, rectRes.Point2UCS);
             rec.ApplyMatrix(app.Editor.UCSMatrix);
 
             app.Database.ModelSpace.Append(rec);
diff --git a/src/Add-on/DrawWineRack/DrawObliqueWineRackTool.ts b/src/Add-on/DrawWineRack/DrawObliqueWineRackTool.ts
index 64d1289dc..24377850b 100644
--- a/src/Add-on/DrawWineRack/DrawObliqueWineRackTool.ts
+++ b/src/Add-on/DrawWineRack/DrawObliqueWineRackTool.ts
@@ -73,7 +73,7 @@ export class DrawObliqueWineRackTool extends DrawWineRackTool
                     break;
             }
 
-            let rectPl = new Polyline().Create2Pt(new Vector3(), new Vector3(spaceWidth, spaceHeight));
+            let rectPl = new Polyline().Rectangle(spaceWidth, spaceHeight);
             let gripWidth = config.boardThick + config.gripWidth;
 
             let retPls: Polyline[] = [];
@@ -652,8 +652,7 @@ export class DrawObliqueWineRackTool extends DrawWineRackTool
     {
         const size = this.space.Size;
         let pl = new Polyline();
-        pl.Create2Pt(new Vector3(), new Vector3(size.y, len));
-        pl.CloseMark = true;
+        pl.Rectangle(size.y, len);
 
         const config = this.Config;
         let addWidth = config.grooveWidthAdd;
diff --git a/src/DatabaseServices/Entity/Extrude.ts b/src/DatabaseServices/Entity/Extrude.ts
index 380c9fb06..24cec29d1 100644
--- a/src/DatabaseServices/Entity/Extrude.ts
+++ b/src/DatabaseServices/Entity/Extrude.ts
@@ -248,7 +248,7 @@ export class ExtrudeSolid extends Entity
         if (!this.contourCurve || !(this.contourCurve instanceof Polyline))
             this.contourCurve = new Polyline();
 
-        this.contourCurve.Create2Pt(new Vector3(), new Vector3(this.width, this.height));
+        this.contourCurve.Rectangle(this.width, this.height);
     }
 
     /**
diff --git a/src/DatabaseServices/Entity/Polyline.ts b/src/DatabaseServices/Entity/Polyline.ts
index b1e891670..32aff8f90 100644
--- a/src/DatabaseServices/Entity/Polyline.ts
+++ b/src/DatabaseServices/Entity/Polyline.ts
@@ -258,7 +258,17 @@ export class Polyline extends Curve
     {
         return this._LineData[index].bul;
     }
-    Create2Pt(p1: Vector3, p2: Vector3)
+    Rectangle(length: number, height: number): this
+    {
+        this.LineData = [
+            { pt: new Vector2(), bul: 0 },
+            { pt: new Vector2(length), bul: 0 },
+            { pt: new Vector2(length, height), bul: 0 },
+            { pt: new Vector2(0, height), bul: 0 }];
+        this.CloseMark = true;
+        return this;
+    }
+    RectangleFrom2Pt(p1: Vector3, p2: Vector3): this
     {
         let box = new Box3();
         box.setFromPoints([p2, p1].map((p: Vector3) => p.clone().applyMatrix4(this.OCSInv)));
@@ -1436,3 +1446,5 @@ export class Polyline extends Curve
         file.Write(this._ClosedMark);
     }
 }
+
+export const TempPolyline = new Polyline();
diff --git a/src/GraphicsSystem/CalcEdgeSealing.ts b/src/GraphicsSystem/CalcEdgeSealing.ts
index 6934ff8b4..83f162d74 100644
--- a/src/GraphicsSystem/CalcEdgeSealing.ts
+++ b/src/GraphicsSystem/CalcEdgeSealing.ts
@@ -5,7 +5,7 @@ import { Board } from "../DatabaseServices/Entity/Board";
 import { Circle } from "../DatabaseServices/Entity/Circle";
 import { Curve } from "../DatabaseServices/Entity/Curve";
 import { Line } from "../DatabaseServices/Entity/Line";
-import { Polyline } from "../DatabaseServices/Entity/Polyline";
+import { Polyline, TempPolyline } from "../DatabaseServices/Entity/Polyline";
 import { angle, equaln, equalv3, isParallelTo, SelectNearP } from "../Geometry/GeUtils";
 import { IntersectOption } from "./IntersectWith";
 
@@ -187,8 +187,7 @@ export function GetBoardSealingCurves(br: Board)
     }
     else
     {
-        let cu = new Polyline().Create2Pt(new Vector3(), new Vector3(br.Width, br.Height))
-        cus = cu.Explode();
+        cus = TempPolyline.Rectangle(br.Width, br.Height).Explode();
     }
     return cus;
 }
diff --git a/src/GraphicsSystem/ToolPath/FeedingToolPath.ts b/src/GraphicsSystem/ToolPath/FeedingToolPath.ts
index bbc623a5c..78bf559d2 100644
--- a/src/GraphicsSystem/ToolPath/FeedingToolPath.ts
+++ b/src/GraphicsSystem/ToolPath/FeedingToolPath.ts
@@ -235,7 +235,7 @@ export class FeedingToolPath extends Singleton
                     box.max.add(new Vector3(0, addLen / 2));
                     box.min.add(new Vector3(0, -addLen / 2));
                 }
-                let pl = new Polyline().Create2Pt(box.min, box.max).ApplyMatrix(curveData.OCS);
+                let pl = new Polyline().RectangleFrom2Pt(box.min, box.max).ApplyMatrix(curveData.OCS);
                 pl.ColorIndex = shape.Outline.Curve.ColorIndex;
                 shape.Outline = Contour.CreateContour(pl);
             }
diff --git a/src/Production/Product.ts b/src/Production/Product.ts
index a48cfbe5d..539bfcd08 100644
--- a/src/Production/Product.ts
+++ b/src/Production/Product.ts
@@ -1,5 +1,4 @@
 import { Matrix4, Vector2, Vector3 } from "three";
-import { arrayLast } from "../Common/ArrayExt";
 import { EBoardKeyList } from "../Common/BoardKeyList";
 import { Vector2ApplyMatrix4 } from "../Common/Matrix4Utils";
 import { GangDrill, GangDrillType } from "../DatabaseServices/3DSolid/GangDrill";