diff --git a/__test__/Geometry/__snapshots__/intersect.test.ts.snap b/__test__/Geometry/__snapshots__/intersect.test.ts.snap
index c622cfc8c..4674cea9c 100644
--- a/__test__/Geometry/__snapshots__/intersect.test.ts.snap
+++ b/__test__/Geometry/__snapshots__/intersect.test.ts.snap
@@ -1,127 +1,5 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`三维空间圆圆相交测试 1`] = `
-Array [
-  Vector3 {
-    "x": 3.8465654731285666,
-    "y": -0.48984005103149847,
-    "z": 0.3777515851723183,
-  },
-  Vector3 {
-    "x": 4.518686772594938,
-    "y": -2.26435797895917,
-    "z": -0.09066385360916496,
-  },
-]
-`;
-
-exports[`三维空间圆圆相交测试 2`] = `
-Array [
-  Vector3 {
-    "x": 1.25,
-    "y": -4.841229182759271,
-    "z": 0,
-  },
-  Vector3 {
-    "x": 1.25,
-    "y": 4.841229182759271,
-    "z": 0,
-  },
-]
-`;
-
-exports[`三维空间圆圆相交测试 3`] = `
-Array [
-  Vector3 {
-    "x": 1.25,
-    "y": 0,
-    "z": -4.841229182759271,
-  },
-  Vector3 {
-    "x": 1.25,
-    "y": 0,
-    "z": 4.841229182759271,
-  },
-]
-`;
-
-exports[`三维空间圆圆相交测试 4`] = `
-Array [
-  Vector3 {
-    "x": 0,
-    "y": -11.313088368701884,
-    "z": -9.556275638274851,
-  },
-  Vector3 {
-    "x": 0,
-    "y": -9.579281670837858,
-    "z": -2.8986776905615708,
-  },
-]
-`;
-
-exports[`三维空间圆圆相交测试 5`] = `Array []`;
-
-exports[`三维空间直线和圆相交测试 1`] = `
-Array [
-  Vector3 {
-    "x": 7.265045456946406,
-    "y": 0,
-    "z": 1.5147084845720027,
-  },
-  Vector3 {
-    "x": 3.9357458826357803,
-    "y": 0,
-    "z": 4.789429377336553,
-  },
-]
-`;
-
-exports[`三维空间直线和圆相交测试 2`] = `
-Array [
-  Vector3 {
-    "x": -3.622627029705465,
-    "y": -3.4462404738565997,
-    "z": 0,
-  },
-  Vector3 {
-    "x": -3.622627029705464,
-    "y": 3.446240473856601,
-    "z": 0,
-  },
-]
-`;
-
-exports[`三维空间直线和圆相交测试 3`] = `
-Array [
-  Vector3 {
-    "x": 9.796270630192112,
-    "y": -13.16305455920182,
-    "z": 4.841809080303142,
-  },
-  Vector3 {
-    "x": 9.796270630192113,
-    "y": -6.270573611488619,
-    "z": 4.841809080303142,
-  },
-]
-`;
-
-exports[`三维空间直线和圆相交测试 4`] = `
-Array [
-  Vector3 {
-    "x": 12.384261138056765,
-    "y": -13.16305455920182,
-    "z": 6.346016491847222,
-  },
-  Vector3 {
-    "x": 12.384261138056765,
-    "y": -6.27057361148862,
-    "z": 6.346016491847221,
-  },
-]
-`;
-
 exports[`三维空间直线相交测试 1`] = `
 Vector3 {
   "x": 5,
@@ -130,13 +8,7 @@ Vector3 {
 }
 `;
 
-exports[`三维空间直线相交测试 2`] = `
-Vector3 {
-  "x": 4.5,
-  "y": 4.5,
-  "z": 4.5,
-}
-`;
+exports[`三维空间直线相交测试 2`] = `undefined`;
 
 exports[`三维空间直线相交测试 3`] = `
 Vector3 {
@@ -145,37 +17,3 @@ Vector3 {
   "z": 5,
 }
 `;
-
-exports[`直线和圆相切 1`] = `
-Array [
-  Vector3 {
-    "x": 34450.21257120082,
-    "y": 3606.7814824644443,
-    "z": 0,
-  },
-]
-`;
-
-exports[`相交测试 1`] = `
-Vector3 {
-  "x": 0.5,
-  "y": 0,
-  "z": 0,
-}
-`;
-
-exports[`相交测试 2`] = `
-Vector3 {
-  "x": 2,
-  "y": 0,
-  "z": 0,
-}
-`;
-
-exports[`相交测试 3`] = `
-Vector3 {
-  "x": 0.5,
-  "y": 5,
-  "z": 0,
-}
-`;
diff --git a/__test__/Interest/line.test.ts b/__test__/Interest/line.test.ts
index 675393289..0d4799afb 100644
--- a/__test__/Interest/line.test.ts
+++ b/__test__/Interest/line.test.ts
@@ -20,7 +20,7 @@ test('直线相交,共线', () =>
     expect(pts.length).toBe(0);
 
     pts = IntersectLineAndLine(l1, l2, IntersectOption.ExtendBoth);//?
-    expect(pts.length).toBe(1);
+    expect(pts.length).toBe(0);
 });
 
 
diff --git a/src/GraphicsSystem/IntersectWith.ts b/src/GraphicsSystem/IntersectWith.ts
index 0418a17d2..f3d24019d 100644
--- a/src/GraphicsSystem/IntersectWith.ts
+++ b/src/GraphicsSystem/IntersectWith.ts
@@ -229,23 +229,14 @@ export function IntersectLAndLFor3D(p1: Vector3, p2: Vector3, p3: Vector3, p4: V
     let z43 = p4.z - p3.z;
     let z42 = p4.z - p2.z;
 
-    let pt: Vector3;
-
     let v1 = p2.clone().sub(p1).normalize();
     let v2 = p4.clone().sub(p3).normalize();
     let w = p3.clone().sub(p1).normalize();
 
     if (equaln(Math.abs(v1.dot(v2)), 1, 1e-6) && (equalv3(w, new Vector3()) || equaln(Math.abs(v1.dot(w)), 1, 1e-6))) //平行共线
-    {
-        let pts = [p1, p2, p3, p4];
-        pts.sort(comparePoint('xyz'));
-        pt = midPoint(pts[1], pts[2]);
-
-    }
+        return undefined;
     else if (equaln(Math.abs(v1.dot(v2)), 1, 1e-6)) //平行不共线
-    {
         return undefined;
-    }
     else if (equaln(getDeterminantFor3V(v1, v2, w), 0, 0.01))
     {
         let t: number;
@@ -261,9 +252,8 @@ export function IntersectLAndLFor3D(p1: Vector3, p2: Vector3, p3: Vector3, p4: V
         {
             t = (y42 * z43 - y43 * z42) / (y12 * z43 - y43 * z12);
         }
-        pt = new Vector3(x12 * t + p2.x, y12 * t + p2.y, z12 * t + p2.z);
+        return new Vector3(x12 * t + p2.x, y12 * t + p2.y, z12 * t + p2.z);
     }
-    return pt;
 }
 export function IntersectLAndLFor3D1(p1: Vector3, p2: Vector3, p3: Vector3, p4: Vector3)
 {