diff --git a/__test__/Room/RoomParse.test.ts b/__test__/Room/RoomParse.test.ts
index 0b758e94a..21b1e3c20 100644
--- a/__test__/Room/RoomParse.test.ts
+++ b/__test__/Room/RoomParse.test.ts
@@ -260,3 +260,24 @@ test('z不为0时分析错误', () =>
     for (let c of walls[0].LidCurves)
         expect(c.Length).toMatchNumberSnapshot();
 });
+
+
+test('直线与圆弧正确的删除盖子线', () =>
+{
+    let d =
+        { "file": [2, "RoomWallLine", 1, 3, 8, 2, 321, false, 1, 7, 0, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 5814.300457333236, -2014.354128653851, 0, 1], 0, 0, true, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 5814.300457333236, -2014.354128653851, 0, 1], 0, 120, 0, 2700, 4062.232098765433, -1342.7555592592594, 0, 4062.232098765433, -564.4939173809105, 0, "RoomWallArc", 3, 8, 2, 329, false, 1, 7, 0, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 10274.71129794628, -2578.8480460347614, 0, 1], 0, 0, true, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1], 0, 79.4, 0, 2700, 2, 398.1787418476097, 3.141592653589793, 0, true], "basePt": { "x": 9816.53255609867, "y": -3357.10968791311, "z": 0 }, "ucs": [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1] };
+
+    let walls = LoadEntityFromFileData<RoomWallLine>(d);
+
+    TestWallCurveParse(walls);
+});
+
+test("直线与圆弧正确的删除盖子线(盒子问题导致点不在线内)", () =>
+{
+    let d =
+        { "file": [2, "RoomWallLine", 1, 3, 8, 2, 100, false, 1, 7, 0, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, -4002.9032397050305, 1355.3730089236885, 0, 1], 0, 0, true, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, -4002.9032397050305, 1355.3730089236885, 0, 1], 0, 120, 0, 2700, 4062.232098765433, -1342.7555592592594, 0, 4062.232098765433, -564.4939173809105, 0, "RoomWallArc", 3, 8, 2, 101, false, 1, 7, 0, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 457.50760090801305, 790.879091542778, 0, 1], 0, 0, true, [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, -9817.203697038267, 3369.7271375775395, 0, 1], 0, 79.4, 0, 2700, 2, 398.1787418476097, 3.141592653589793, 0, true], "basePt": { "x": -0.6711409395975352, "y": 12.61744966442916, "z": 0 }, "ucs": [1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1] };
+
+    let walls = LoadEntityFromFileData<RoomWallLine>(d);
+
+    TestWallCurveParse(walls);
+});
diff --git a/__test__/Room/__snapshots__/RoomParse.test.ts.snap b/__test__/Room/__snapshots__/RoomParse.test.ts.snap
index 3772dd7ea..0e18687f0 100644
--- a/__test__/Room/__snapshots__/RoomParse.test.ts.snap
+++ b/__test__/Room/__snapshots__/RoomParse.test.ts.snap
@@ -1342,6 +1342,134 @@ Array [
 ]
 `;
 
+exports[`直线与圆弧正确的删除盖子线 1`] = `
+Array [
+  0,
+  778.2616418783487,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线 2`] = `
+Array [
+  0,
+  778.2616418783487,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线 3`] = `
+Array [
+  120,
+  0,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线 4`] = `
+Array [
+  -20.299999999999272,
+  0,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线 5`] = `
+Array [
+  -20.30000000000109,
+  0,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线 6`] = `
+Array [
+  2.6812339980917268e-14,
+  437.87874184760966,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线 7`] = `
+Array [
+  2.1950492188302275e-14,
+  358.4787418476097,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线 8`] = `
+Array [
+  79.39999999999964,
+  0,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线(盒子问题导致点不在线内) 1`] = `
+Array [
+  0,
+  778.2616418783487,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线(盒子问题导致点不在线内) 2`] = `
+Array [
+  0,
+  778.2616418783487,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线(盒子问题导致点不在线内) 3`] = `
+Array [
+  120,
+  0,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线(盒子问题导致点不在线内) 4`] = `
+Array [
+  -20.299999999999102,
+  0,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线(盒子问题导致点不在线内) 5`] = `
+Array [
+  -20.30000000000092,
+  0,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线(盒子问题导致点不在线内) 6`] = `
+Array [
+  2.6812339980917268e-14,
+  437.87874184760966,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线(盒子问题导致点不在线内) 7`] = `
+Array [
+  2.1950492188302275e-14,
+  358.4787418476097,
+  0,
+]
+`;
+
+exports[`直线与圆弧正确的删除盖子线(盒子问题导致点不在线内) 8`] = `
+Array [
+  79.40000000000009,
+  0,
+  0,
+]
+`;
+
 exports[`直线圆弧2 1`] = `
 Array [
   1487.019691385767,
diff --git a/src/DatabaseServices/Room/ParseService/CurveTrim.ts b/src/DatabaseServices/Room/ParseService/CurveTrim.ts
index 39c056cda..9818b5cb5 100644
--- a/src/DatabaseServices/Room/ParseService/CurveTrim.ts
+++ b/src/DatabaseServices/Room/ParseService/CurveTrim.ts
@@ -18,7 +18,7 @@ export class CurveTrim
     public _Box: Box3;
     constructor(public _curve: Line | Arc)
     {
-        this._Box = _curve.BoundingBox;
+        this._Box = _curve.BoundingBox.expandByVector(new Vector3(0.01, 0.01));
     }
 
     TrimBy(contour: Contour, box: Box3, saveSyntropy = false)
@@ -123,7 +123,7 @@ export class CurveTrimLine extends CurveTrim
                 if (cu.ParamOnCurve(d.param) && equalv3(d.closestPt, p, 1e-5))//点在线上
                 {
                     let derv = cu.GetFistDeriv(d.param).normalize();
-                    return equalv3(derv, this.derv) || (saveSyntropy && equalv3(derv.negate(), this.derv));//因为墙体为顺时针 轮廓为逆时针 所以这里相等=反向
+                    return equalv3(derv, this.derv, 1e-4) || (saveSyntropy && equalv3(derv.negate(), this.derv, 1e-4));//因为墙体为顺时针 轮廓为逆时针 所以这里相等=反向
                 }
             }
             else
@@ -131,7 +131,7 @@ export class CurveTrimLine extends CurveTrim
                 if (cu.PtOnCurve(p, 1e-5))
                 {
                     let derv = cu.GetFistDeriv(cu.GetParamAtPoint2(p)).normalize();
-                    return equalv3(this.derv, derv) || (saveSyntropy && equalv3(derv.negate(), this.derv));
+                    return equalv3(this.derv, derv, 1e-4) || (saveSyntropy && equalv3(derv.negate(), this.derv, 1e-4));
                 }
             }
         }
@@ -190,7 +190,7 @@ export class CurveTrimArc extends CurveTrim
                 if (cu.ParamOnCurve(d.param) && equalv3(d.closestPt, p, 1e-5))//点在线上  //这个代码似乎是错误的,因为直线和圆弧不可能重合
                 {
                     let derv = cu.GetFistDeriv(d.param).normalize();
-                    return equalv3(derv, thisDerv) || (saveSyntropy && equalv3(derv.negate(), thisDerv));//因为墙体为顺时针 轮廓为逆时针 所以这里相等=反向
+                    return equalv3(derv, thisDerv, 1e-4) || (saveSyntropy && equalv3(derv.negate(), thisDerv, 1e-4));//因为墙体为顺时针 轮廓为逆时针 所以这里相等=反向
                 }
             }
             else
@@ -198,7 +198,7 @@ export class CurveTrimArc extends CurveTrim
                 if (cu.PtOnCurve(p, 1e-5))
                 {
                     let cuDerv = cu.GetFistDeriv(cu.GetParamAtPoint2(p)).normalize();
-                    return equalv3(thisDerv, cuDerv) || (saveSyntropy && equalv3(cuDerv.negate(), thisDerv));
+                    return equalv3(thisDerv, cuDerv, 1e-4) || (saveSyntropy && equalv3(cuDerv.negate(), thisDerv, 1e-4));
                 }
             }
         }
diff --git a/src/DatabaseServices/Room/ParseService/RoomWallParse.ts b/src/DatabaseServices/Room/ParseService/RoomWallParse.ts
index e3634c43e..48914c64c 100644
--- a/src/DatabaseServices/Room/ParseService/RoomWallParse.ts
+++ b/src/DatabaseServices/Room/ParseService/RoomWallParse.ts
@@ -14,7 +14,7 @@ import { Line } from "../../Entity/Line";
 import { Polyline } from "../../Entity/Polyline";
 import { RoomWallBase } from "../Entity/Wall/RoomWallBase";
 import { CurveTrim, CurveTrimArc, CurveTrimLine } from "./CurveTrim";
-import { CreateGetCurveParam, GetCurveParam, GetLineParam, LEFT_ROTATE_MTX2 } from './GetCurveParam';
+import { CreateGetCurveParam, GetCurveParam, GetLineParam } from './GetCurveParam';
 import { RoomRegionParse } from './RoomRegionParse';
 import { RoomWallExtendAndBreak } from "./RoomWallExtendAndBreak";
 
@@ -678,9 +678,7 @@ export class RoomWallParse
 
                 if (!dir)
                 {
-                    dir = offsetCurve.GetFistDeriv(0).normalize();
-                    LEFT_ROTATE_MTX2.applyVector(dir);
-                    if (type !== CurveType.Left) dir.negate();
+                    dir = offsetCurve.GetFistDeriv(0).normalize().negate();
                 }
 
                 trim = new CurveTrimLine(offsetCurve, dir);
@@ -770,9 +768,12 @@ export class RoomWallParse
 
         let fb = new Flatbush(trimContours.length);
         this.boxs = [];
+
+        let v = new Vector3(1e-2, 1e-2);
         for (let con of trimContours)
         {
             let box = con.BoundingBox;
+            box.expandByVector(v);
             fb.add(box.min.x, box.min.y, box.max.x, box.max.y);
             this.boxs.push(box);
         }