diff --git a/src/GraphicsSystem/LinkSelft.ts b/src/GraphicsSystem/LinkSelft.ts
index b7ebe9f85..538afcb89 100644
--- a/src/GraphicsSystem/LinkSelft.ts
+++ b/src/GraphicsSystem/LinkSelft.ts
@@ -67,7 +67,6 @@ export class LinkSelf
     //计算闭合的区域
     private CalCloseCurve(breakCus: Curve[], cuMap: CurveMap)
     {
-
         let breakCount = breakCus.length;
 
         let selfRoutes: Set<Curve>[] = [];
@@ -137,6 +136,7 @@ export class LinkSelf
     }
     linkCurve(originCu: Curve, cuMap: CurveMap, cs: Curve[], isInv: boolean = false)
     {
+        //FIXME:两线共线时连接有问题
         let cuIndex = this.GetCurveIndex(originCu);
         while (true)
         {
diff --git a/src/GraphicsSystem/OffestPolyline.ts b/src/GraphicsSystem/OffestPolyline.ts
index 9e978dd79..9759f6fff 100644
--- a/src/GraphicsSystem/OffestPolyline.ts
+++ b/src/GraphicsSystem/OffestPolyline.ts
@@ -58,13 +58,23 @@ export class PolyOffestUtil
         //     c.Outline.ColorIndex = 2;
         //     app.m_Database.ModelSpace.Append(c.Outline);
         // })
-
+        // console.time("trim");
         let newPls = this.trimAndJointOffestPolyline(offres1, this.m_Polyline);
+        // console.timeEnd("trim");
+
+        // console.time("con");
         let cus = this.trimByContours(newPls, contours);
+        // console.timeEnd("con");
+
+        // return cus;
+        // console.time("link");
         let rets = this.linkSelfingCurves2(cus);
+        // console.timeEnd('link');
         if (!this.IsKeepAllCurves)
         {
+            // console.time("op");
             rets = this.optimizeCus(rets);
+            // console.timeEnd("op");
         }
         return rets;
     }
@@ -585,9 +595,8 @@ export class PolyOffestUtil
         {
             retPls.push(noSealCus[0]);
         }
-        retPls.push(firstLine);
+        firstLine && retPls.push(firstLine);
         retPls.push(...sealCus);
-
         return retPls;
     }
     closePolyline(pl: Polyline)