diff --git a/src/Add-on/FilletUtils.ts b/src/Add-on/FilletUtils.ts
index c97cc9084..816d9d8db 100644
--- a/src/Add-on/FilletUtils.ts
+++ b/src/Add-on/FilletUtils.ts
@@ -451,6 +451,8 @@ export class FilletUtils
         //------1.求交
         let l = new Line(brRes.Point, ptRes.Point);
         l.ApplyMatrix(br.OCSInv);
+        l.StartPoint = l.StartPoint.setZ(0);
+        l.EndPoint = l.EndPoint.setZ(0);
 
         let ipts = l.IntersectWith(brContour, IntersectOption.ExtendThis);
 
@@ -463,13 +465,9 @@ export class FilletUtils
 
         let res = this.FilletPolyLineSelf(es1, es2);
         if (res && res.cu1)
-        {
-            let cu1OcsInv = res.cu1.OCSInv;
-            brContour.CopyFrom(res.cu1.ApplyMatrix(cu1OcsInv));
-            return brContour;
-        }
+            return res.cu1 as Polyline;
         else
-            return "倒角失败"
+            return "倒角失败";
     }
 
     /**