diff --git a/__test__/Polyline/PointInPolyline.test.ts b/__test__/Polyline/PointInPolyline.test.ts
index 5d6abb912..94ebd73b3 100644
--- a/__test__/Polyline/PointInPolyline.test.ts
+++ b/__test__/Polyline/PointInPolyline.test.ts
@@ -192,6 +192,21 @@ describe("", () =>
         expect(pl.PtInCurve(p)).toBeFalsy();
     });
 
+    test('直线和圆弧相切2IKOTO', () =>
+    {
+        let f = new CADFile();
+        f.Data =
+            [1, ["Polyline", 1, 1, 667, false, 6, -1, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1], 2, 5, [5135.438782795266, 1651.835443234731], -0.9999915853997117, [5470.58864251807, 1651.8382633987026], 0, [5370.588642280742, 1651.8413831024218], 0.9999560507337252, [5235.438782795266, 1651.835443234731], 0, [5135.438782795266, 1651.835443234731], 0, false]]
+
+        f.Read();
+
+        let pl = f.ReadObject() as Polyline;
+
+        let p = new Vector3().fromArray([5370.588642541802, -904.7955785523422, 0]);
+
+        expect(pl.PtInCurve(p)).toBeFalsy();
+    });
+
 
     test('大圆弧', () =>
     {
diff --git a/src/DatabaseServices/PointInPolyline.ts b/src/DatabaseServices/PointInPolyline.ts
index 7b29e5d32..08c79a442 100644
--- a/src/DatabaseServices/PointInPolyline.ts
+++ b/src/DatabaseServices/PointInPolyline.ts
@@ -70,7 +70,7 @@ export function IsPointInPolyLine(pl: Polyline, pt: Vector3): boolean
 
     for (let i = 0; i < pl.EndParam; i++)
     {
-        if (equaln(pl.GetBuilgeAt(i), 0, 1e-7))//直线
+        if (equaln(pl.GetBuilgeAt(i), 0, 5e-6))//直线
         {
             let sp = pl.GetPointAtParam(i);
             let ep = pl.GetPointAtParam(i + 1);
@@ -79,17 +79,17 @@ export function IsPointInPolyLine(pl: Polyline, pt: Vector3): boolean
                 continue;
             //线垂直Y轴
             let derX = ep.x - sp.x;
-            if (equaln(derX, 0, 1e-7))
+            if (equaln(derX, 0, 5e-6))
                 continue;
 
             //起点
-            if (equaln(sp.x, pt.x, 1e-7))
+            if (equaln(sp.x, pt.x, 5e-6))
             {
                 if (sp.y > pt.y && derX < 0) crossings++;
                 continue;
             }
             //终点
-            if (equaln(ep.x, pt.x, 1e-7))
+            if (equaln(ep.x, pt.x, 5e-6))
             {
                 if (ep.y > pt.y && derX > 0) crossings++;
                 continue;