diff --git a/src/DatabaseServices/Polyline.ts b/src/DatabaseServices/Polyline.ts
index 6304e628a..e6640e7f8 100644
--- a/src/DatabaseServices/Polyline.ts
+++ b/src/DatabaseServices/Polyline.ts
@@ -1,15 +1,15 @@
 import * as THREE from 'three';
-import { Box3, Geometry, Object3D, Vector2, Vector3, Matrix4 } from 'three';
+import { Box3, Geometry, Matrix4, Object3D, Vector2, Vector3 } from 'three';
 import { CreateBoardUtil } from '../ApplicationServices/mesh/createBoard';
 import { arrayLast } from '../Common/ArrayExt';
 import { ColorMaterial } from '../Common/ColorPalette';
 import { Vec2DTo3D, Vec3DTo2D, getDeterminantFor2V } from '../Common/CurveUtils';
 import { matrixAlignCoordSys } from '../Common/Matrix4Utils';
 import { FixIndex } from '../Common/Utils';
-import { equal, equaln, rotatePoint, updateGeometry } from '../Geometry/GeUtils';
+import { equal, equaln, updateGeometry } from '../Geometry/GeUtils';
 import { RenderType } from '../GraphicsSystem/Enum';
 import { IntersectOption, IntersectPolylineAndCurve } from '../GraphicsSystem/IntersectWith';
-import { PolyOffestUtil, PolyOffestUtil2, PolyOffestUtil3 } from '../GraphicsSystem/OffestPolyline';
+import { PolyOffestUtil3 } from '../GraphicsSystem/OffestPolyline';
 import { Arc } from './Arc';
 import { Factory } from './CADFactory';
 import { CADFile } from './CADFile';
diff --git a/src/GraphicsSystem/IntersectWith.ts b/src/GraphicsSystem/IntersectWith.ts
index 8f3365cfa..fb28a0b60 100644
--- a/src/GraphicsSystem/IntersectWith.ts
+++ b/src/GraphicsSystem/IntersectWith.ts
@@ -244,6 +244,7 @@ export function IntersectLAndLFor3D(p1: Vector3, p2: Vector3, p3: Vector3, p4: V
         let par = tmpLine.GetParamAtPoint(p3);
         if (par)
         {
+            //FIXME:这样拿交点会导致判断点在线上发生错误
             pt = midPoint(midPoint(p1, p2), midPoint(p3, p4));
         }
     }
diff --git a/src/GraphicsSystem/OffestPolyline.ts b/src/GraphicsSystem/OffestPolyline.ts
index 8ccd495dd..19f1aeb0b 100644
--- a/src/GraphicsSystem/OffestPolyline.ts
+++ b/src/GraphicsSystem/OffestPolyline.ts
@@ -1,21 +1,15 @@
 import { Vector2, Vector3 } from "three";
-import { Vec2DTo3D, Vec3DTo2D, getCirAngleByChordAndTangent, curveLinkGroup } from "../Common/CurveUtils";
-import { sliceDeep } from "../Common/Utils";
+import { arrayLast } from "../Common/ArrayExt";
+import { Vec2DTo3D, Vec3DTo2D, curveLinkGroup, getCirAngleByChordAndTangent } from "../Common/CurveUtils";
 import { Arc } from "../DatabaseServices/Arc";
 import { Circle } from "../DatabaseServices/Circle";
 import { Contour } from "../DatabaseServices/Contour";
 import { Curve } from "../DatabaseServices/Curve";
 import { Line } from "../DatabaseServices/Line";
 import { Polyline, PolylineProps } from '../DatabaseServices/Polyline';
-import { MoveMatrix, angleTo, equal, equaln } from "../Geometry/GeUtils";
-import { isTargetCurInSourceCur, isTargetCurOutOrOnSourceCur, isTargetCurOnSourceCur } from "./BoolOperateUtils";
+import { equal, equaln } from "../Geometry/GeUtils";
+import { isTargetCurInSourceCur, isTargetCurOutOrOnSourceCur } from "./BoolOperateUtils";
 import { IntersectOption } from "./IntersectWith";
-import { removeRepeat, arrayLast, filterArray } from "../Common/ArrayExt";
-import { Region } from "../DatabaseServices/Region";
-import { Shape } from "../DatabaseServices/Shape";
-import { app } from "../ApplicationServices/Application";
-import { ShapeManager } from "../DatabaseServices/ShapeManager";
-import { intercept } from "mobx";
 interface offestRes
 {
     index: number,
@@ -1079,30 +1073,15 @@ export class PolyOffestUtil3
             contours.push(this.buildContourByTwoSideOfest(plList1[i].pl, plList2[i].pl));
         }
         let newPls = this.trimAndJointOffestPolyline(plList1, this.m_Polyline);
-        // let refPls = this.trimAndJointOffestPolyline(plList2, this.m_Polyline);
-
-        // let refPl = new Polyline(refProps);
-        // return [...newPls, ...refPls]
 
         let cus = this.trimByContours(newPls, contours);
+
         if (this.m_Polyline.IsClose && this.offDir < 0)
         {
             cus = cus.filter(pl => isTargetCurInSourceCur(this.m_Polyline, pl))
         }
 
-        let isIntersectWithSelf = this.isSelfingCUs(cus);
-        if (isIntersectWithSelf)
-        {
-            // cus.forEach(c => c.ColorIndex = 2);
-
-            // return cus;
-            return this.linkSelfingCurves(cus);
-        } else
-            return this.linkCurves(cus);
-
-        // let cus1 = this.trimByContours(refPls, contours);
-        // return [...cus, ...cus1]
-        //  闭合时向内偏移，偏移线段应在封闭区域内,自交情况下无效
+        return this.linkSelfingCurves(cus);
 
     }
     //偏移曲线
@@ -1343,12 +1322,14 @@ export class PolyOffestUtil3
         }
         return needCutPls;
     }
-    getIntersectWithSelf(cus: Curve[])
-    {
-        let pls: Polyline[] = [];
-
-        return pls;
-    }
+    /**
+     * 判断曲线是否自交
+     * 
+     * @private
+     * @param {Curve[]} cus 
+     * @returns 
+     * @memberof PolyOffestUtil3
+     */
     private isSelfingCUs(cus: Curve[])
     {
         for (let i = 0; i < cus.length; i++)
@@ -1391,6 +1372,14 @@ export class PolyOffestUtil3
         }
         return resultPls;
     }
+
+    /**
+     *连接自交曲线数组
+     * 
+     * @param {Curve[]} cus 
+     * @returns 
+     * @memberof PolyOffestUtil3
+     */
     linkSelfingCurves(cus: Curve[])
     {
         let newPls: Polyline[] = [];
@@ -1400,7 +1389,6 @@ export class PolyOffestUtil3
         {
             let pl = new Polyline();
             let frontLine = cus.shift();
-            pl.Join(frontLine);
 
             let end = 0;
 
@@ -1424,34 +1412,47 @@ export class PolyOffestUtil3
                     let parForFront = frontLine.GetParamAtPoint(pts[0]);
                     let parForLater = laterLine.GetParamAtPoint(pts[0]);
 
+                    if (equaln(parForLater, 1))
+                        continue;
+
                     if (equaln(parForFront, 0))
                     {
-                        pl.LineData.pop()
-                        cus.unshift(frontLine);
+
                     }
-                    else if (!equaln(parForFront, 1))
+                    else if (equaln(parForFront, 1))
                     {
-                        pl.EndPoint = pts[0];
+                        pl.Join(frontLine);
                     }
-
-                    if (equaln(parForLater, 0))
+                    else
                     {
-                        pl.Join(laterLine);
-                        frontLine = laterLine;
-                    } else if (!equaln(parForLater, 1))
+                        let spliteCusForFront = frontLine.GetSplitCurves(parForFront);
+                        pl.Join(spliteCusForFront[0]);
+                        cus.unshift(spliteCusForFront[1]);
+                        j++;
+                    }
+                    if (equaln(parForLater, 0))
+                        frontLine = cus.splice(j, 1)[0];
+                    else
                     {
-                        let spliteCusForLater = laterLine.GetSplitCurves(parForLater);
-                        pl.Join(spliteCusForLater[1]);
-                        cus[j].StartPoint = pts[0];
-
-                        frontLine = spliteCusForLater[1];
+                        let splitCus = laterLine.GetSplitCurves(parForLater);
+                        cus[j].EndPoint = pts[0];
+                        frontLine = splitCus[1];
                     }
-                    end = j + 1
-                    j = cus.length - 1;
+                    end = j;
+                    j = cus.length;
+                }
+
+                //搜索到尽头,先直接join,先不判断
+                if (end >= j)
+                {
+                    pl.Join(frontLine);
+                    break;
                 }
             }
+
             newPls.push(pl);
             isSelfing = this.isSelfingCUs(cus);
+
         }
         newPls.push(...this.linkCurves(cus));
         return newPls;