diff --git a/__test__/Booloperate/BoardCutting.test.ts b/__test__/Booloperate/BoardCutting.test.ts
index 0d6ea5e21..655609f18 100644
--- a/__test__/Booloperate/BoardCutting.test.ts
+++ b/__test__/Booloperate/BoardCutting.test.ts
@@ -33,3 +33,33 @@ test('板件与板件切割_分裂成多个', () =>
         expect(b.Thickness).toMatchNumberSnapshot();
     }
 });
+
+test('斜切割', () =>
+{
+    let d =
+        { "file": [2, "Board", 3, 2, 101, false, 1, 11, 0, [0, 1, 0, 0, 0, 0, 1, 0, 1, 0, 0, 0, -2215.328823760792, 499.71410406375077, -2294.099214285263, 1], 2, 1200, 600, 18, true, "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, [0, 0], 0, [600, 0], 0, [600, 1200], 0, [0, 1200], 0, true, 0, 3, 0, 0, 0, 2, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, -205.28537176904496, 177.69146652013302, 0, 1], 1, "左侧板", { "roomName": "", "cabinetName": "", "boardName": "", "material": "", "color": "", "lines": 0, "bigHoleDir": 0, "composingFace": 2, "highSealed": [], "sealedUp": "1", "sealedDown": "1", "sealedLeft": "1", "sealedRight": "1", "spliteHeight": "", "spliteWidth": "", "spliteThickness": "", "highDrill": ["三合一", "三合一", "三合一", "三合一"], "frontDrill": true, "backDrill": true, "drillType": "三合一" }, 0, 0, "Board", 3, 2, 102, false, 1, 2, 0, [0, 1, 0, 0, -0.9502295409734979, 0, -0.31155066917163815, 0, -0.31155066917163815, 0, 0.9502295409734979, 0, -1370.93197964564, 499.71410406375077, -1535.8828067472384, 1], 2, 1210.53726169844, 600, 18, true, "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, [0, 0], 0, [600, 0], 0, [600, 1210.53726169844], 0, [0, 1210.53726169844], 0, true, 0, 3, 0, 0, 0, 2, [0.9502295409734979, 0, 0.31155066917163815, 0, 0, 1, 0, 0, -0.31155066917163815, 0, 0.9502295409734979, 0, 639.1114723461071, 177.69146652013302, 758.2164075380244, 1], 0, "层板", { "roomName": "", "cabinetName": "", "boardName": "", "material": "", "color": "", "lines": 0, "bigHoleDir": 0, "composingFace": 2, "highSealed": [], "sealedUp": "1", "sealedDown": "1", "sealedLeft": "1", "sealedRight": "1", "spliteHeight": "", "spliteWidth": "", "spliteThickness": "", "highDrill": ["三合一", "三合一", "三合一", "三合一"], "frontDrill": true, "backDrill": true, "drillType": "三合一" }, 0, 0], "basePt": { "x": -1847.3471649178755, "y": -8951.992136339191, "z": 0 } }
+
+    {
+        let [br0, br1] = LoadBoardsFromFileData(d) as Board[];
+        let splitBrs = CuttingBoard(br0, [br1]);
+
+        splitBrs.push(br0);
+        for (let b of splitBrs)
+        {
+            expect(b.Width).toMatchNumberSnapshot();
+            expect(b.Height).toMatchNumberSnapshot();
+            expect(b.Thickness).toMatchNumberSnapshot();
+        }
+    }
+    {
+        let [br1, br0] = LoadBoardsFromFileData(d) as Board[];
+        let splitBrs = CuttingBoard(br0, [br1]);
+        splitBrs.push(br0);
+        for (let b of splitBrs)
+        {
+            expect(b.Width).toMatchNumberSnapshot();
+            expect(b.Height).toMatchNumberSnapshot();
+            expect(b.Thickness).toMatchNumberSnapshot();
+        }
+    }
+});
diff --git a/__test__/Booloperate/__snapshots__/BoardCutting.test.ts.snap b/__test__/Booloperate/__snapshots__/BoardCutting.test.ts.snap
index 3cfdf82ed..d97ba9764 100644
--- a/__test__/Booloperate/__snapshots__/BoardCutting.test.ts.snap
+++ b/__test__/Booloperate/__snapshots__/BoardCutting.test.ts.snap
@@ -1,5 +1,29 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
+exports[`斜切割 1`] = `"600.00000"`;
+
+exports[`斜切割 2`] = `"481.36498"`;
+
+exports[`斜切割 3`] = `"18.00000"`;
+
+exports[`斜切割 4`] = `"600.00000"`;
+
+exports[`斜切割 5`] = `"693.79059"`;
+
+exports[`斜切割 6`] = `"18.00000"`;
+
+exports[`斜切割 7`] = `"600.00000"`;
+
+exports[`斜切割 8`] = `"321.91319"`;
+
+exports[`斜切割 9`] = `"18.00000"`;
+
+exports[`斜切割 10`] = `"600.00000"`;
+
+exports[`斜切割 11`] = `"863.77964"`;
+
+exports[`斜切割 12`] = `"18.00000"`;
+
 exports[`板件与板件切割_分裂成多个 1`] = `"600.00000"`;
 
 exports[`板件与板件切割_分裂成多个 2`] = `"435.90920"`;
diff --git a/src/DatabaseServices/Extrude.ts b/src/DatabaseServices/Extrude.ts
index e016fc716..58a240dc3 100644
--- a/src/DatabaseServices/Extrude.ts
+++ b/src/DatabaseServices/Extrude.ts
@@ -698,6 +698,7 @@ export class ExtureSolid extends Entity
             let yv = target.Normal;
             let zv = this.Normal;
             let xv = yv.clone().cross(zv);
+            yv.copy(zv).cross(xv);
             let m = new Matrix4().makeBasis(xv, yv, zv).copyPosition(this.OCS);
             let mi = new Matrix4().getInverse(m).multiply(this.OCS);