diff --git a/__test__/EdgeSealing/EdgeSealing.test.ts b/__test__/EdgeSealing/EdgeSealing.test.ts
index 6d7d1fdef..448f813aa 100644
--- a/__test__/EdgeSealing/EdgeSealing.test.ts
+++ b/__test__/EdgeSealing/EdgeSealing.test.ts
@@ -297,6 +297,18 @@ test('镜像判断不足导致点表凸度错误', () =>
     }
 });
 
+test('镜像判断不足导致点表凸度错误2', () =>
+{
+    let d = { "file": [2, "Polyline", 10, 2, 334, 0, 1, 1, 71, [-0.9999999999656061, 1.2246467991473532e-16, 0, 0, 1.2246467991052327e-16, 1, -1.836970198657849e-16, 0, -2.2496396739154126e-32, 0.000008293838842227955, -0.9999999999656061, 0, 14.099999999652617, 1801.9929776066522, 0, 1], 0, 0, 1, [-0.9999999999656061, 1.2246467991473532e-16, 0, 0, -1.2246467991052327e-16, -1, 1.836970198657849e-16, 0, -2.2496396739154126e-32, 0.000008293838842227955, -0.9999999999656061, 0, 14.099999999652617, 1801.9929776066522, 0, 1], 0, 0, 1, 2, 7, [-5.900000002308138, -2.9999999999995453], 1.0000000002948952, [-5.900000001151641, 3.0000000000004547], 0, [-43.90000000030762, 3.0000000000004547], 0.9999999997563894, [-43.90000000230811, -2.9999999999995453], 0, [-5.900000002308138, -2.9999999999995453], 0, [-5.90000000230814, 9.048410439361683e-13], 0, [-43.9000000023081, 9.094947017729282e-13], 0, false, "Polyline", 10, 2, 335, 0, 1, 1, 71, [-0.9999999999656061, 1.2246467991473532e-16, 0, 0, 1.2246467991052327e-16, 1, -1.836970198657849e-16, 0, -2.2496396739154126e-32, 0.000008293838842227955, -0.9999999999656061, 0, 2768.980476434901, 333.88495492131983, 0, 1], 0, 0, 1, [-0.9999999999656061, 1.2246467991473532e-16, 0, 0, -1.2246467991052327e-16, -1, 1.836970198657849e-16, 0, -2.2496396739154126e-32, 0.000008293838842227955, -0.9999999999656061, 0, 2768.980476434901, 333.88495492131983, 0, 1], 0, 0, 1, 2, 7, [2737.030476527089, 1478.0672999923568], 0.9999999993630507, [2737.0304765289998, 1484.0672999999997], 0, [2724.930476529, 1484.0672999999997], 0.9999999993630501, [2724.930476529, 1478.0672999999997], 0, [2737.030476527089, 1478.0672999923568], 0, [2737.0304765289998, 1481.0672999999997], 0, [2724.930476529, 1481.0672999999997], 0, false], "basePt": { "x": 17.000000000294897, "y": 1798.9929776066524, "z": -0.00002488151683044617 }, "ucs": [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1] };
+    let pls = LoadEntityFromFileData(d) as Polyline[];
+
+    for (let pl of pls)
+    {
+        let ptsbuls = ConverToPtsBul(pl, false);
+        expect(ptsbuls).toMatchSnapshot();
+    }
+});
+
 
 //测试代码
 /**
diff --git a/__test__/EdgeSealing/__snapshots__/EdgeSealing.test.ts.snap b/__test__/EdgeSealing/__snapshots__/EdgeSealing.test.ts.snap
index 52a1e9e4e..e651c0a72 100644
--- a/__test__/EdgeSealing/__snapshots__/EdgeSealing.test.ts.snap
+++ b/__test__/EdgeSealing/__snapshots__/EdgeSealing.test.ts.snap
@@ -249,3 +249,91 @@ Object {
   ],
 }
 `;
+
+exports[`镜像判断不足导致点表凸度错误2 1`] = `
+Object {
+  "buls": Array [
+    -1.0000000002948952,
+    -0,
+    -0.9999999997563894,
+    -0,
+    -0,
+    -0,
+    -0,
+  ],
+  "pts": Array [
+    Vector2 {
+      "x": 20.000000001757833,
+      "y": 1798.9929776066526,
+    },
+    Vector2 {
+      "x": 20.000000000601332,
+      "y": 1804.9929776066526,
+    },
+    Vector2 {
+      "x": 57.99999999845034,
+      "y": 1804.9929776066526,
+    },
+    Vector2 {
+      "x": 58.00000000045083,
+      "y": 1798.9929776066526,
+    },
+    Vector2 {
+      "x": 20.000000001757833,
+      "y": 1798.9929776066526,
+    },
+    Vector2 {
+      "x": 20.000000001757833,
+      "y": 1801.992977606653,
+    },
+    Vector2 {
+      "x": 58.00000000045082,
+      "y": 1801.992977606653,
+    },
+  ],
+}
+`;
+
+exports[`镜像判断不足导致点表凸度错误2 2`] = `
+Object {
+  "buls": Array [
+    -0.9999999993630507,
+    -0,
+    -0.9999999993630501,
+    -0,
+    -0,
+    -0,
+    -0,
+  ],
+  "pts": Array [
+    Vector2 {
+      "x": 31.95000000194932,
+      "y": 1811.9522549136768,
+    },
+    Vector2 {
+      "x": 31.95000000003847,
+      "y": 1817.9522549213198,
+    },
+    Vector2 {
+      "x": 44.04999999962229,
+      "y": 1817.9522549213198,
+    },
+    Vector2 {
+      "x": 44.04999999962229,
+      "y": 1811.9522549213198,
+    },
+    Vector2 {
+      "x": 31.95000000194932,
+      "y": 1811.9522549136768,
+    },
+    Vector2 {
+      "x": 31.95000000003847,
+      "y": 1814.9522549213198,
+    },
+    Vector2 {
+      "x": 44.04999999962229,
+      "y": 1814.9522549213198,
+    },
+  ],
+}
+`;
diff --git a/src/Production/Convert2PtsBul.ts b/src/Production/Convert2PtsBul.ts
index b15a337bb..f90683df9 100644
--- a/src/Production/Convert2PtsBul.ts
+++ b/src/Production/Convert2PtsBul.ts
@@ -4,7 +4,7 @@ import { Vector2ApplyMatrix4 } from "../Common/Matrix4Utils";
 import { Arc } from "../DatabaseServices/Entity/Arc";
 import { Circle } from "../DatabaseServices/Entity/Circle";
 import { Polyline } from "../DatabaseServices/Entity/Polyline";
-import { equaln, equalv3 } from "../Geometry/GeUtils";
+import { equaln } from "../Geometry/GeUtils";
 
 
 /**轮廓(多段线Pts Bul)数据 */
@@ -16,7 +16,6 @@ export interface IContourData
 
 const x = new Vector3;
 const y = new Vector3;
-const z = new Vector3;
 
 let tempPolyline: Polyline;
 
@@ -42,19 +41,14 @@ export function ConverToPtsBul(cu: Polyline | Circle, isOutline = true): IContou
     //判断是不是被镜像了
     x.setFromMatrixColumn(ocs, 0);
     y.setFromMatrixColumn(ocs, 1);
-    z.setFromMatrixColumn(ocs, 2);
     let z1 = x.cross(y);
-    let isMirror = 0;
-    if (equaln(ocs.elements[10], -1, 1e-4)) isMirror++;
-    if (!equalv3(z, z1)) isMirror++;
+    let isMirror = !equaln(z1.z, 1, 1e-3);
 
     for (let i = 0; i < ptsBuls.pts.length; i++)
     {
         Vector2ApplyMatrix4(ocs, ptsBuls.pts[i]);
-        if (isMirror === 1)
+        if (isMirror)
             ptsBuls.buls[i] *= -1;
-        // else if (isMirror === 0)  { }//测试覆盖率
-        // else if (isMirror === 2)  { }//测试覆盖率
     }
 
     if (isOutline && cu.IsClose)