diff --git a/__test__/Polyline/offsetbug.test.ts b/__test__/Polyline/offsetbug.test.ts
index 141a62f85..119b2e130 100644
--- a/__test__/Polyline/offsetbug.test.ts
+++ b/__test__/Polyline/offsetbug.test.ts
@@ -60,3 +60,16 @@ test('补充bug测试#IKWGF', () =>
     expect(cus[2].Length).toMatchSnapshot();
 
 });
+
+test("偏移真交点判断错误", () =>
+{
+    let data =
+        [1, "Polyline", 5, 2, 102, false, 1, 7, 0, [0, 1, 0, 0, -1, 0, 0, 0, 0, 0, 1, 0, 1671.5225704902539, 783.1395680459682, 0, 1], 0, 0, 2, 3, [-75, -2.842170943040401e-14], 0.9999999999999997, [75, 0], -0.9999999999999997, [225, -5.684341886080802e-14], 0.9999999999999923, true]
+
+    let pl = loadFile(data)[0];
+
+    //situation 1
+    let cus = pl.GetOffsetCurves(75);
+    expect(cus.length).toBe(1);
+
+})
diff --git a/src/GraphicsSystem/OffsetPolyline.ts b/src/GraphicsSystem/OffsetPolyline.ts
index 697626ce9..6b645e3aa 100644
--- a/src/GraphicsSystem/OffsetPolyline.ts
+++ b/src/GraphicsSystem/OffsetPolyline.ts
@@ -314,6 +314,7 @@ export class PolyOffsetUtil
                 tPts = iPts.filter(p =>
                     frontLine.PtOnCurve(p)
                     && laterLine.PtOnCurve(p)
+                    && !equalv3(laterLine.EndPoint, p)
                 );
             }
 
@@ -355,6 +356,7 @@ export class PolyOffsetUtil
                 this._Polyline.GetCurveAtParam(offResList[0].index),
                 this._RetCurves[0]);
         };
+        cirContours = cirContours.filter(cir => cir !== undefined);
         this._Contours.push(...cirContours);
     }