diff --git a/__test__/Polyline/__snapshots__/split.test.ts.snap b/__test__/Polyline/__snapshots__/split.test.ts.snap
index d837a4ebf..d8c0a23b1 100644
--- a/__test__/Polyline/__snapshots__/split.test.ts.snap
+++ b/__test__/Polyline/__snapshots__/split.test.ts.snap
@@ -49,6 +49,41 @@ Array [
 
 exports[`单刀 2`] = `
 Array [
+  Object {
+    "bul": 0.41421356237309503,
+    "pt": Vector2 {
+      "x": 7.5,
+      "y": 2.5,
+    },
+  },
+  Object {
+    "bul": -1,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 10,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 10,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 0,
+    },
+  },
   Object {
     "bul": 0,
     "pt": Vector2 {
@@ -76,23 +111,23 @@ Array [
 exports[`单刀 3`] = `
 Array [
   Object {
-    "bul": 0.41421356237309503,
+    "bul": -0.9999999999999999,
     "pt": Vector2 {
-      "x": 7.5,
-      "y": 2.5,
+      "x": 5,
+      "y": 5,
     },
   },
   Object {
-    "bul": -1,
+    "bul": 0,
     "pt": Vector2 {
       "x": 5,
-      "y": 5,
+      "y": 10,
     },
   },
   Object {
     "bul": 0,
     "pt": Vector2 {
-      "x": 5,
+      "x": 0,
       "y": 10,
     },
   },
@@ -100,7 +135,7 @@ Array [
     "bul": 0,
     "pt": Vector2 {
       "x": 0,
-      "y": 10,
+      "y": 0,
     },
   },
   Object {
@@ -110,11 +145,53 @@ Array [
       "y": 0,
     },
   },
+  Object {
+    "bul": 1,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 0,
+    },
+  },
+  Object {
+    "bul": -1,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 5,
+    },
+  },
 ]
 `;
 
 exports[`单刀 4`] = `
 Array [
+  Object {
+    "bul": -0.41421356237309503,
+    "pt": Vector2 {
+      "x": 2.5,
+      "y": 7.5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 10,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 10,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 0,
+    },
+  },
   Object {
     "bul": 0,
     "pt": Vector2 {
@@ -130,28 +207,35 @@ Array [
     },
   },
   Object {
-    "bul": -1,
+    "bul": -0.41421356237309503,
     "pt": Vector2 {
       "x": 5,
       "y": 5,
     },
   },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 2.5,
+      "y": 7.5,
+    },
+  },
 ]
 `;
 
 exports[`单刀 5`] = `
 Array [
   Object {
-    "bul": -0.9999999999999999,
+    "bul": 0,
     "pt": Vector2 {
       "x": 5,
-      "y": 5,
+      "y": 10,
     },
   },
   Object {
     "bul": 0,
     "pt": Vector2 {
-      "x": 5,
+      "x": 0,
       "y": 10,
     },
   },
@@ -159,7 +243,7 @@ Array [
     "bul": 0,
     "pt": Vector2 {
       "x": 0,
-      "y": 10,
+      "y": 0,
     },
   },
   Object {
@@ -169,6 +253,27 @@ Array [
       "y": 0,
     },
   },
+  Object {
+    "bul": 1,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 0,
+    },
+  },
+  Object {
+    "bul": -1,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 10,
+    },
+  },
 ]
 `;
 
@@ -573,3 +678,733 @@ Array [
   },
 ]
 `;
+
+exports[`多切刀 1`] = `
+Array [
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 0,
+    },
+  },
+  Object {
+    "bul": 1,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 0,
+    },
+  },
+]
+`;
+
+exports[`多切刀 2`] = `
+Array [
+  Object {
+    "bul": 0.15838444032453625,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 0,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 6.4694631307311825,
+      "y": 0.4774575140626309,
+    },
+  },
+]
+`;
+
+exports[`多切刀 3`] = `
+Array [
+  Object {
+    "bul": 0.24007875908011606,
+    "pt": Vector2 {
+      "x": 6.4694631307311825,
+      "y": 0.4774575140626309,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 7.5,
+      "y": 2.5,
+    },
+  },
+]
+`;
+
+exports[`多切刀 4`] = `
+Array [
+  Object {
+    "bul": 0.24007875908011606,
+    "pt": Vector2 {
+      "x": 7.5,
+      "y": 2.5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 6.469463130731183,
+      "y": 4.522542485937368,
+    },
+  },
+]
+`;
+
+exports[`多切刀 5`] = `
+Array [
+  Object {
+    "bul": 0.15838444032453625,
+    "pt": Vector2 {
+      "x": 6.469463130731183,
+      "y": 4.522542485937368,
+    },
+  },
+  Object {
+    "bul": -1,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 5,
+    },
+  },
+]
+`;
+
+exports[`多切刀 6`] = `
+Array [
+  Object {
+    "bul": -0.15838444032453644,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 3.530536869268815,
+      "y": 5.477457514062634,
+    },
+  },
+]
+`;
+
+exports[`多切刀 7`] = `
+Array [
+  Object {
+    "bul": -0.2400787590801159,
+    "pt": Vector2 {
+      "x": 3.530536869268815,
+      "y": 5.477457514062634,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 2.5,
+      "y": 7.5,
+    },
+  },
+]
+`;
+
+exports[`多切刀 8`] = `
+Array [
+  Object {
+    "bul": -0.2400787590801159,
+    "pt": Vector2 {
+      "x": 2.5,
+      "y": 7.5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 3.5305368692688166,
+      "y": 9.522542485937368,
+    },
+  },
+]
+`;
+
+exports[`多切刀 9`] = `
+Array [
+  Object {
+    "bul": -0.15838444032453644,
+    "pt": Vector2 {
+      "x": 3.5305368692688166,
+      "y": 9.522542485937368,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 10,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 10,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 0,
+    },
+  },
+]
+`;
+
+exports[`多切刀 10`] = `
+Array [
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 0,
+    },
+  },
+  Object {
+    "bul": 1,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 0,
+    },
+  },
+]
+`;
+
+exports[`多切刀 11`] = `
+Array [
+  Object {
+    "bul": 0.15838444032453625,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 0,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 6.4694631307311825,
+      "y": 0.4774575140626309,
+    },
+  },
+]
+`;
+
+exports[`多切刀 12`] = `
+Array [
+  Object {
+    "bul": 0.24007875908011606,
+    "pt": Vector2 {
+      "x": 6.4694631307311825,
+      "y": 0.4774575140626309,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 7.5,
+      "y": 2.5,
+    },
+  },
+]
+`;
+
+exports[`多切刀 13`] = `
+Array [
+  Object {
+    "bul": 0.24007875908011606,
+    "pt": Vector2 {
+      "x": 7.5,
+      "y": 2.5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 6.469463130731183,
+      "y": 4.522542485937368,
+    },
+  },
+]
+`;
+
+exports[`多切刀 14`] = `
+Array [
+  Object {
+    "bul": 0.15838444032453625,
+    "pt": Vector2 {
+      "x": 6.469463130731183,
+      "y": 4.522542485937368,
+    },
+  },
+  Object {
+    "bul": -1,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 5,
+    },
+  },
+]
+`;
+
+exports[`多切刀 15`] = `
+Array [
+  Object {
+    "bul": -0.15838444032453644,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 3.530536869268815,
+      "y": 5.477457514062634,
+    },
+  },
+]
+`;
+
+exports[`多切刀 16`] = `
+Array [
+  Object {
+    "bul": -0.2400787590801159,
+    "pt": Vector2 {
+      "x": 3.530536869268815,
+      "y": 5.477457514062634,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 2.5,
+      "y": 7.5,
+    },
+  },
+]
+`;
+
+exports[`多切刀 17`] = `
+Array [
+  Object {
+    "bul": -0.2400787590801159,
+    "pt": Vector2 {
+      "x": 2.5,
+      "y": 7.5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 3.5305368692688166,
+      "y": 9.522542485937368,
+    },
+  },
+]
+`;
+
+exports[`多切刀 18`] = `
+Array [
+  Object {
+    "bul": -0.15838444032453644,
+    "pt": Vector2 {
+      "x": 3.5305368692688166,
+      "y": 9.522542485937368,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 10,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 10,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 0,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 1`] = `
+Array [
+  Object {
+    "bul": 0.15838444032453625,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 0,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 6.4694631307311825,
+      "y": 0.4774575140626309,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 2`] = `
+Array [
+  Object {
+    "bul": 0.24007875908011606,
+    "pt": Vector2 {
+      "x": 6.4694631307311825,
+      "y": 0.4774575140626309,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 7.5,
+      "y": 2.5,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 3`] = `
+Array [
+  Object {
+    "bul": 0.24007875908011606,
+    "pt": Vector2 {
+      "x": 7.5,
+      "y": 2.5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 6.469463130731183,
+      "y": 4.522542485937368,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 4`] = `
+Array [
+  Object {
+    "bul": 0.15838444032453625,
+    "pt": Vector2 {
+      "x": 6.469463130731183,
+      "y": 4.522542485937368,
+    },
+  },
+  Object {
+    "bul": -1,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 5,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 5`] = `
+Array [
+  Object {
+    "bul": -0.15838444032453644,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 3.530536869268815,
+      "y": 5.477457514062634,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 6`] = `
+Array [
+  Object {
+    "bul": -0.2400787590801159,
+    "pt": Vector2 {
+      "x": 3.530536869268815,
+      "y": 5.477457514062634,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 2.5,
+      "y": 7.5,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 7`] = `
+Array [
+  Object {
+    "bul": -0.2400787590801159,
+    "pt": Vector2 {
+      "x": 2.5,
+      "y": 7.5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 3.5305368692688166,
+      "y": 9.522542485937368,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 8`] = `
+Array [
+  Object {
+    "bul": -0.15838444032453644,
+    "pt": Vector2 {
+      "x": 3.5305368692688166,
+      "y": 9.522542485937368,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 10,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 10,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 0,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 0,
+    },
+  },
+  Object {
+    "bul": 1,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 0,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 9`] = `
+Array [
+  Object {
+    "bul": 0.15838444032453625,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 0,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 6.4694631307311825,
+      "y": 0.4774575140626309,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 10`] = `
+Array [
+  Object {
+    "bul": 0.24007875908011606,
+    "pt": Vector2 {
+      "x": 6.4694631307311825,
+      "y": 0.4774575140626309,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 7.5,
+      "y": 2.5,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 11`] = `
+Array [
+  Object {
+    "bul": 0.24007875908011606,
+    "pt": Vector2 {
+      "x": 7.5,
+      "y": 2.5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 6.469463130731183,
+      "y": 4.522542485937368,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 12`] = `
+Array [
+  Object {
+    "bul": 0.15838444032453625,
+    "pt": Vector2 {
+      "x": 6.469463130731183,
+      "y": 4.522542485937368,
+    },
+  },
+  Object {
+    "bul": -1,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 5,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 13`] = `
+Array [
+  Object {
+    "bul": -0.15838444032453644,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 3.530536869268815,
+      "y": 5.477457514062634,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 14`] = `
+Array [
+  Object {
+    "bul": -0.2400787590801159,
+    "pt": Vector2 {
+      "x": 3.530536869268815,
+      "y": 5.477457514062634,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 2.5,
+      "y": 7.5,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 15`] = `
+Array [
+  Object {
+    "bul": -0.2400787590801159,
+    "pt": Vector2 {
+      "x": 2.5,
+      "y": 7.5,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 3.5305368692688166,
+      "y": 9.522542485937368,
+    },
+  },
+]
+`;
+
+exports[`多切刀闭合 16`] = `
+Array [
+  Object {
+    "bul": -0.15838444032453644,
+    "pt": Vector2 {
+      "x": 3.5305368692688166,
+      "y": 9.522542485937368,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 10,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 10,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 0,
+    },
+  },
+  Object {
+    "bul": 0,
+    "pt": Vector2 {
+      "x": 0,
+      "y": 0,
+    },
+  },
+  Object {
+    "bul": 1,
+    "pt": Vector2 {
+      "x": 5,
+      "y": 0,
+    },
+  },
+]
+`;