diff --git a/__test__/EdgeSealing/__snapshots__/EdgeSealing.test.ts.snap b/__test__/EdgeSealing/__snapshots__/EdgeSealing.test.ts.snap
index 9f632c851..548275281 100644
--- a/__test__/EdgeSealing/__snapshots__/EdgeSealing.test.ts.snap
+++ b/__test__/EdgeSealing/__snapshots__/EdgeSealing.test.ts.snap
@@ -8,11 +8,11 @@ exports[`切割残留一个封边厚度的凸角的板件封边 1`] = `30420`;
 
 exports[`切割残留一个封边厚度的凸角的板件封边 2`] = `30420`;
 
-exports[`封边错误板件 1`] = `130118.4094685434`;
+exports[`封边错误板件 1`] = `130118.40946854133`;
 
 exports[`封边错误板件2 1`] = `779770.9650700318`;
 
-exports[`封边错误板件3 1`] = `359947.9512754363`;
+exports[`封边错误板件3 1`] = `359947.9362569036`;
 
 exports[`封边错误板件4 1`] = `30748.998596293524`;
 
@@ -42,4 +42,4 @@ exports[`异型板件,非相切圆弧 1`] = `635612.2751433642`;
 
 exports[`异型板件,非相切圆弧 2`] = `626242.2196800549`;
 
-exports[`椭圆弧封边 1`] = `23816.280001572693`;
+exports[`椭圆弧封边 1`] = `23816.280001593965`;
diff --git a/src/DatabaseServices/Entity/Polyline.ts b/src/DatabaseServices/Entity/Polyline.ts
index b838c898a..4cc2ffa68 100644
--- a/src/DatabaseServices/Entity/Polyline.ts
+++ b/src/DatabaseServices/Entity/Polyline.ts
@@ -1019,6 +1019,47 @@ export class Polyline extends Curve
 
         return pl;
     }
+    /**首尾相连的曲线直接连接 */
+    static FastCombine(curves: Curve[], tolerance = 1e-5): Polyline | undefined
+    {
+        if (!curves || curves.length === 0) return;
+
+        let pl = new Polyline;
+        pl.OCS = ComputerCurvesNormalOCS(curves);
+
+        let ocsInv = pl.OCSInv;
+
+        let lineData: PolylineProps[] = [];
+        for (let i = 0; i < curves.length; i++)
+        {
+            let cu = curves[i];
+            let bul = 0;
+            if (cu instanceof Arc)
+                bul = cu.Bul;
+
+            lineData.push({
+                pt: AsVector2(cu.StartPoint.applyMatrix4(ocsInv)),
+                bul
+            });
+
+            if (i === curves.length - 1)
+            {
+                lineData.push({
+                    pt: AsVector2(cu.EndPoint.applyMatrix4(ocsInv)),
+                    bul: 0
+                });
+            }
+        }
+
+        if (lineData.length > 1)
+        {
+            let ld = arrayLast(lineData).pt;
+            if (equalv2(lineData[0].pt, ld, tolerance))
+                ld.copy(lineData[0].pt);
+        }
+        pl.LineData = lineData;
+        return pl;
+    }
 
     PtOnCurve(pt: Vector3): boolean
     {
diff --git a/src/GraphicsSystem/CalcEdgeSealing.ts b/src/GraphicsSystem/CalcEdgeSealing.ts
index e1311fdf2..785d35ac8 100644
--- a/src/GraphicsSystem/CalcEdgeSealing.ts
+++ b/src/GraphicsSystem/CalcEdgeSealing.ts
@@ -333,7 +333,7 @@ export function GetSealedBoardContour(br: Board, hasSealing: boolean): Polyline
         return offsetCus[0] as Circle;
 
     if (!CalcEdgeSealing(offsetCus)) return;
-    let pl = Polyline.Combine(offsetCus, LINK_FUZZ);
+    let pl = Polyline.FastCombine(offsetCus, LINK_FUZZ);
     if (dir < 0)
         pl.Reverse();
     return pl;
diff --git a/src/Production/Product.ts b/src/Production/Product.ts
index a43e38eea..751c2c573 100644
--- a/src/Production/Product.ts
+++ b/src/Production/Product.ts
@@ -513,7 +513,7 @@ export namespace Production
         }
         let cus = con.Explode();
         MergeCurvelist(cus);
-        let pl = Polyline.Combine(cus, LINK_FUZZ);
+        let pl = Polyline.FastCombine(cus, LINK_FUZZ);
         if (isSplite && pl.Area2 < 0)
             pl.Reverse();
         return pl;