diff --git a/__test__/Booloperate/__snapshots__/bool4.test.ts.snap b/__test__/Booloperate/__snapshots__/bool4.test.ts.snap
new file mode 100644
index 000000000..733722f48
--- /dev/null
+++ b/__test__/Booloperate/__snapshots__/bool4.test.ts.snap
@@ -0,0 +1,5 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`交点大于等于2_但是还是分离 1`] = `310430.5057844047`;
+
+exports[`交点大于等于2_但是还是分离 2`] = `40090.549687200226`;
diff --git a/__test__/Booloperate/bool4.test.ts b/__test__/Booloperate/bool4.test.ts
new file mode 100644
index 000000000..e67c54991
--- /dev/null
+++ b/__test__/Booloperate/bool4.test.ts
@@ -0,0 +1,18 @@
+import { LoadRegionsFromFileData } from "../Utils/LoadEntity.util";
+import { BoolOpeartionType } from "../../src/GraphicsSystem/BoolOperateUtils";
+
+test('交点大于等于2_但是还是分离', () =>
+{
+
+    let d = [2, "Region", 3, 2, 629, false, 1, 7, 0, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1], 1, 1, 1, 1, "Polyline", 3, 2, 0, false, 0, 7, 0, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1], 2, 4, [5842.2632447015285, -382.81544021645357], 0, [6075.449244701528, -382.81544021645357], 0, [6075.449244701528, -210.8902402164536], 0, [5842.2632447015285, -210.8902402164536], 0, true, 0, "Region", 3, 2, 630, false, 1, 7, 0, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1], 1, 1, 1, 1, "Polyline", 3, 2, 0, false, 0, 7, 0, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1], 2, 8, [5622.910304827508, -210.8902402164536], 0, [5842.2632447015285, -210.8902402164536], 0, [5842.2632447015285, -13.274942384012917], 0, [6075.449244701528, -13.274942384012888], 0, [6075.449244701528, -210.8902402164536], 0, [6253.303004827509, -210.8902402164536], 0, [6253.303004827509, 291.05255978354637], 0, [5622.910304827508, 291.05255978354637], 0, true, 0]
+
+    let [reg1, reg2] = LoadRegionsFromFileData(d);
+
+    let reg = reg1.Clone();
+    reg.BooleanOper(reg2.Clone(), BoolOpeartionType.Union);
+    expect(reg.Area).toMatchSnapshot();
+
+    reg = reg1.Clone();
+    reg.BooleanOper(reg2.Clone(), BoolOpeartionType.Subtract);
+    expect(reg.Area).toMatchSnapshot();
+});
diff --git a/src/DatabaseServices/Contour.ts b/src/DatabaseServices/Contour.ts
index 2b31b0fec..e0b1f7e4c 100644
--- a/src/DatabaseServices/Contour.ts
+++ b/src/DatabaseServices/Contour.ts
@@ -98,6 +98,11 @@ export class Contour
     UnionBoolOperation(target: Contour): Contour[]
     {
         let resultCus = this.GetIntersetAndUnionList(target);
+
+        //快速
+        if (resultCus.unionList.every(c => c.IsClose))
+            return Contour.GetAllContour(resultCus.unionList);
+
         //并集后的线段表如果有共线的直接合并起来
         let cus: Curve[] = [];
         for (let pl of resultCus.unionList)
@@ -248,6 +253,12 @@ export class Contour
                     unionList.push(pl);
                 }
             }
+
+            //特殊的分离
+            if (intersectionList.length === 0 && unionList.length === (sourceCus.length + targetCus.length))
+            {
+                return { intersectionList, unionList: [sourceOutline, targetOutline] };
+            }
         }
         return { intersectionList, unionList };
     }
@@ -295,11 +306,18 @@ export class Contour
                     subtractList.push(pl);
             }
 
+            //源对象没有被破坏
+            let sourceNotBreak = subtractList.length === sourceCus.length;
+
             for (let pl of targetCus)
             {
                 if (this.CuInOutline(pl))
                     subtractList.push(pl);
             }
+
+            if (sourceNotBreak && subtractList.length === sourceCus.length)
+                return [sourceOutline];
+
             return subtractList;
         }
     }