diff --git a/__test__/Polyline/offset.test.ts b/__test__/Polyline/offset.test.ts
index 0904c1b88..24530782f 100644
--- a/__test__/Polyline/offset.test.ts
+++ b/__test__/Polyline/offset.test.ts
@@ -504,8 +504,7 @@ describe("补圆弧测试", () =>
         {
             expect(cus[0].GetOffsetCurves(-i).length).toBe(1);
         }
-        //FIXME:没清理干净
-        // expect(cus[0].GetOffsetCurves(27.3).length).toBe(1);
+        expect(cus[0].GetOffsetCurves(27.3).length).toBe(1);
     })
     test("补圆弧测试3", () =>
     {
diff --git a/src/GraphicsSystem/OffestPolyline.ts b/src/GraphicsSystem/OffestPolyline.ts
index 0f9116a9e..01f81f28d 100644
--- a/src/GraphicsSystem/OffestPolyline.ts
+++ b/src/GraphicsSystem/OffestPolyline.ts
@@ -179,7 +179,7 @@ export class PolyOffestUtil
     }
 
     /**
-     * 根据曲线构造轮廓
+     * 根据2曲线或者点构造轮廓
      *
      * @private
      * @param {Curve} cu1
@@ -187,37 +187,51 @@ export class PolyOffestUtil
      * @returns
      * @memberof PolyOffestUtil
      */
-    private BuildContour(cu1: Curve, cu2: Curve): Contour
+    private BuildContour(cu1: Curve, cu2: Curve | Vector3): Contour
     {
-        let l1 = new Line(cu1.StartPoint, cu2.StartPoint);
-        let l2 = new Line(cu1.EndPoint, cu2.EndPoint);
-        if (cu1 instanceof Arc && cu2 instanceof Arc)
+        if (cu2 instanceof Curve)
         {
-            let pts1 = l1.IntersectWith(cu2, 0);
-            if (pts1.length === 2)
+            let l1 = new Line(cu1.StartPoint, cu2.StartPoint);
+            let l2 = new Line(cu1.EndPoint, cu2.EndPoint);
+            if (cu1 instanceof Arc && cu2 instanceof Arc)
             {
-                let splitCus = cu2.GetSplitCurvesByPts(pts1);
-                this.unNeedCutCus.push(splitCus[0])
+                let pts1 = l1.IntersectWith(cu2, 0);
+                if (pts1.length === 2)
+                {
+                    let splitCus = cu2.GetSplitCurvesByPts(pts1);
+                    this.unNeedCutCus.push(splitCus[0])
+                }
+                let pts2 = l2.IntersectWith(cu2, 0);
+                if (pts2.length === 2)
+                {
+                    let splitCus = cu2.GetSplitCurvesByPts(pts2);
+                    this.unNeedCutCus.push(splitCus[1])
+                }
             }
-            let pts2 = l2.IntersectWith(cu2, 0);
-            if (pts2.length === 2)
+            //防止轮廓自交
+            if (l1.IntersectWith(l2, 0).length > 0)
             {
-                let splitCus = cu2.GetSplitCurvesByPts(pts2);
-                this.unNeedCutCus.push(splitCus[1])
+                l1 = new Line(cu1.StartPoint, cu2.EndPoint);
+                l2 = new Line(cu1.EndPoint, cu2.StartPoint);
             }
+            return Contour.CreateContour([
+                cu1.Clone() as Curve,
+                cu2.Clone() as Curve,
+                l1,
+                l2
+            ]);
         }
-        //防止轮廓自交
-        if (l1.IntersectWith(l2, 0).length > 0)
+        else
         {
-            l1 = new Line(cu1.StartPoint, cu2.EndPoint);
-            l2 = new Line(cu1.EndPoint, cu2.StartPoint);
+            let l1 = new Line(cu1.StartPoint, cu2);
+            let l2 = new Line(cu1.EndPoint, cu2);
+            return Contour.CreateContour([
+                cu1,
+                l1,
+                l2
+            ]);
         }
-        return Contour.CreateContour([
-            cu1.Clone() as Curve,
-            cu2.Clone() as Curve,
-            l1,
-            l2
-        ]);
+
     }
     private BuildCircleContour(i: number | Vector3, cons: Contour[])
     {
@@ -324,6 +338,18 @@ export class PolyOffestUtil
             if (tPts.length > 0)//存在真交点情况下直接修剪
             {
                 let iPt = this.selectFitInterPt(tPts, frontLine.EndPoint);
+                if (isFillArc)
+                {
+                    //用丢失圆弧和交点构建扇形轮廓
+                    for (let i = startIndex + 1; ; i++)
+                    {
+                        let index = FixIndex(i, this.m_PtCount);
+                        let cu = this.m_Polyline.GetCurveAtParam(index);
+                        cirContours.push(this.BuildContour(cu, iPt));
+
+                        if (index === endIndex - 1) break;
+                    }
+                }
                 this.appendNewCuAndContour(frontLine, nextStartPt, iPt, startIndex);
             }
             else if (isFillArc || iPts.length === 0)//连交点都没或者圆弧丢失补圆弧