diff --git a/src/Add-on/interfere.ts b/src/Add-on/interfere.ts
new file mode 100644
index 000000000..16e30b3a2
--- /dev/null
+++ b/src/Add-on/interfere.ts
@@ -0,0 +1,132 @@
+
+import { Intent } from '@blueprintjs/core';
+import { Mesh, Vector3 } from 'three';
+import { app } from '../ApplicationServices/Application';
+import { DisposeThreeObj } from '../Common/Dispose';
+import { CylinderHole } from '../DatabaseServices/3DSolid/CylinderHole';
+import { Entity } from '../DatabaseServices/Entity/Entity';
+import { ExtrudeSolid } from '../DatabaseServices/Entity/Extrude';
+import { PromptStatus } from '../Editor/PromptResult';
+import { userConfig } from '../Editor/UserConfig';
+import { RenderType } from '../GraphicsSystem/RenderType';
+import { InterfereModal } from '../UI/Components/Modal/InterfereModal';
+import { ModalPosition } from '../UI/Components/Modal/ModalsManage';
+import { ColorMaterial } from './../Common/ColorPalette';
+import { CSG } from './../csg/core/CSG';
+import { CSG2Geometry, Geometry2CSG } from './../csg/core/Geometry2CSG';
+import { FastDrillingMeshGeometry } from './../DatabaseServices/3DSolid/CylinderHole';
+import { ExtrudeHole } from './../DatabaseServices/3DSolid/ExtrudeHole';
+import { SweepSolid } from './../DatabaseServices/3DSolid/SweepSolid';
+import { Command } from './../Editor/CommandMachine';
+import { AppToaster } from './../UI/Components/Toaster';
+
+//| CylinderHole | ExtrudeHole
+export type Solid3D = ExtrudeSolid | SweepSolid | ExtrudeHole;
+
+export class Interfere implements Command
+{
+    async exec()
+    {
+        const Filter = {
+            filterTypes: [ExtrudeHole, ExtrudeSolid, SweepSolid]
+        };
+
+        let enRes = await app.Editor.GetSelection({
+            Msg: "选择检查干涉的对象",
+            Filter
+        });
+
+        if (enRes.Status === PromptStatus.Cancel) return;
+
+        let ens = enRes.SelectSet.SelectEntityList as Solid3D[];
+        let set1 = new Set();
+        let objMap: Map<Mesh, [Solid3D, Solid3D]> = new Map();
+        const csgCache: WeakMap<Entity, CSG> = new WeakMap();
+
+        for (let i = 0; i < ens.length; i++)
+        {
+            let e1 = ens[i];
+
+            let c1: CSG;
+            if (csgCache.has(e1))
+                c1 = csgCache.get(e1);
+            else
+                c1 = this.GetCSG(e1);
+
+            let obb1 = e1.OBB;
+
+            for (let j = i + 1; j < ens.length; j++)
+            {
+                let e2 = ens[j];
+                if (!obb1.intersectsOBB(e2.OBB))
+                    continue;
+
+                let c2: CSG;
+                if (csgCache.has(e2))
+                    c2 = csgCache.get(e2);
+                else
+                {
+                    c2 = this.GetCSG(e2);
+                    csgCache.set(e2, c2);
+                }
+
+                if (!c2)
+                    console.error("实体CSG出错");
+
+                let c = c1.intersect(c2.transform1(e1.OCSInv.multiply(e2.OCS)));
+
+                if (c.polygons.length > 0)
+                {
+                    set1.add(e1);
+                    set1.add(e2);
+                    let g = CSG2Geometry(c).applyMatrix4(e1.OCS);
+                    g.computeBoundingBox();
+                    if (g.boundingBox.getSize(new Vector3).toArray().every(n => n > 1 - 1e-3))
+                    {
+                        let m = new Mesh(g, ColorMaterial.GetBasicMaterial(1).clone());
+                        objMap.set(m, [e1, e2]);
+                    }
+                }
+            }
+        }
+        if (objMap.size === 0)
+        {
+            AppToaster.show({
+                message: "未找到干涉对象",
+                timeout: 2000,
+                intent: Intent.SUCCESS,
+            });
+            return;
+        }
+
+        for (let [o,] of objMap)
+        {
+            app.Viewer.Scene.add(o);
+        }
+        let oldType = userConfig.RenderType;
+        userConfig.RenderType = RenderType.Wireframe;
+
+        app.Editor.ModalManage.RenderModeless(InterfereModal, ModalPosition.Center, { count: set1.size, data: objMap });
+
+        await app.Editor.ModalManage.Wait();
+
+        for (let [o,] of objMap)
+        {
+            DisposeThreeObj(o);
+            app.Viewer.Scene.remove(o);
+        }
+
+        userConfig.RenderType = oldType;
+    }
+    private GetCSG(en: Solid3D)
+    {
+        if (en instanceof ExtrudeSolid)
+        {
+            return en.CSG;
+        }
+        else
+        {
+            return Geometry2CSG(en.MeshGeometry);
+        }
+    }
+}
diff --git a/src/DatabaseServices/3DSolid/CylinderHole.ts b/src/DatabaseServices/3DSolid/CylinderHole.ts
index b2328bbec..99a47ed6c 100644
--- a/src/DatabaseServices/3DSolid/CylinderHole.ts
+++ b/src/DatabaseServices/3DSolid/CylinderHole.ts
@@ -94,7 +94,7 @@ export class CylinderHole extends Hole
         return box.applyMatrix4(this.OCS);
     }
     private _MeshGeometry: CylinderBufferGeometry;
-    private get MeshGeometry()
+    get MeshGeometry()
     {
         if (this._MeshGeometry)
             return this._MeshGeometry;
diff --git a/src/DatabaseServices/3DSolid/ExtrudeHole.ts b/src/DatabaseServices/3DSolid/ExtrudeHole.ts
index 2a9ad74e7..c9a817ce8 100644
--- a/src/DatabaseServices/3DSolid/ExtrudeHole.ts
+++ b/src/DatabaseServices/3DSolid/ExtrudeHole.ts
@@ -17,6 +17,7 @@ import { ExtureContourCurve } from "../Entity/Extrude";
 import { Polyline } from "../Entity/Polyline";
 import { Shape } from "../Shape";
 import { Hole } from "./Hole";
+import { OBB } from './../../Geometry/OBB/obb';
 
 @Factory
 export class ExtrudeHole extends Hole
@@ -154,7 +155,7 @@ export class ExtrudeHole extends Hole
         return this._EdgeGeometry;
     }
     private _MeshGeometry: BufferGeometry | Geometry;
-    private get MeshGeometry()
+    get MeshGeometry()
     {
         if (this._MeshGeometry)
             return this._MeshGeometry;
@@ -347,6 +348,11 @@ export class ExtrudeHole extends Hole
             obj.add(...FastWireframe2(this));
         }
     }
+    get OBB(): OBB
+    {
+        let size = this.ContourCurve.BoundingBox.getSize(new Vector3).setZ(this.Height);
+        return new OBB(this.OCS, size.multiplyScalar(0.5));
+    }
     ReadFile(file: CADFiler)
     {
         super.ReadFile(file);
diff --git a/src/DatabaseServices/3DSolid/SweepSolid.ts b/src/DatabaseServices/3DSolid/SweepSolid.ts
index 23f3231c9..698d1d7d8 100644
--- a/src/DatabaseServices/3DSolid/SweepSolid.ts
+++ b/src/DatabaseServices/3DSolid/SweepSolid.ts
@@ -15,6 +15,7 @@ import { Entity } from "../Entity/Entity";
 import { arrayLast } from "../../Common/ArrayExt";
 import { Box3Ext } from "../../Geometry/Box";
 import { ObjectSnapMode } from "../../Editor/ObjectSnapMode";
+import { OBB } from './../../Geometry/OBB/obb';
 
 @Factory
 export class SweepSolid extends Entity
@@ -118,7 +119,7 @@ export class SweepSolid extends Entity
         console.log("提供的轮廓没有和路径垂直");
     }
     private _MeshGeometry: SweepGeometry;
-    private get MeshGeometry()
+    get MeshGeometry()
     {
         if (this._MeshGeometry)
             return this._MeshGeometry;
@@ -193,6 +194,12 @@ export class SweepSolid extends Entity
     {
         return new Box3Ext().setFromPoints(this.GetStretchPoints());
     }
+    get OBB(): OBB
+    {
+        let s = this.Contour.BoundingBox.getSize(new Vector3);
+        let size = this._PathCurve.BoundingBox.getSize(new Vector3).setZ(Math.max(s.x, s.y));
+        return new OBB(this.OCS, size.multiplyScalar(0.5));
+    }
     GetObjectSnapPoints(
         snapMode: ObjectSnapMode,
         pickPoint: Vector3,
diff --git a/src/DatabaseServices/Entity/Extrude.ts b/src/DatabaseServices/Entity/Extrude.ts
index 9b3157086..0d0d7dc17 100644
--- a/src/DatabaseServices/Entity/Extrude.ts
+++ b/src/DatabaseServices/Entity/Extrude.ts
@@ -1213,7 +1213,7 @@ export class ExtrudeSolid extends Entity
     }
 
     private _MeshGeometry: Geometry | BufferGeometry;
-    private get MeshGeometry()
+    get MeshGeometry()
     {
         if (this._MeshGeometry)
             return this._MeshGeometry;
diff --git a/src/Editor/CommandRegister.ts b/src/Editor/CommandRegister.ts
index 76a9d00a8..4fb060f90 100644
--- a/src/Editor/CommandRegister.ts
+++ b/src/Editor/CommandRegister.ts
@@ -157,6 +157,7 @@ import { Text2Curve } from "../Add-on/Text2Curve";
 import { DrawVisualSpaceBox } from "../Add-on/Template/DrawVisualSpaceBox";
 import { Align } from './../Add-on/Align';
 import { BuyMaterial } from './../Add-on/BuyMaterial';
+import { Interfere } from './../Add-on/interfere';
 
 export function registerCommand()
 {
@@ -432,6 +433,7 @@ export function registerCommand()
     commandMachine.RegisterCommand("align", new Align());
 
     commandMachine.RegisterCommand("buymaterial", new BuyMaterial());
+    commandMachine.RegisterCommand("interfere", new Interfere());
     RegistCustomCommand();
 }
 
diff --git a/src/UI/Components/Modal/InterfereModal.tsx b/src/UI/Components/Modal/InterfereModal.tsx
new file mode 100644
index 000000000..324728679
--- /dev/null
+++ b/src/UI/Components/Modal/InterfereModal.tsx
@@ -0,0 +1,112 @@
+import React, { Component } from 'react';
+import { Classes, Button } from '@blueprintjs/core';
+import { app } from '../../../ApplicationServices/Application';
+import { Card } from '@blueprintjs/core';
+import { Mesh, MeshBasicMaterial, Vector3, Box3 } from 'three';
+import { Solid3D } from '../../../Add-on/interfere';
+import { Intent } from '@blueprintjs/core';
+import { observable } from 'mobx';
+import { observer } from 'mobx-react';
+import { ColorMaterial } from './../../../Common/ColorPalette';
+import { FixIndex } from './../../../Common/Utils';
+import { CommonModal } from './ModalContainer';
+
+interface IInterfereProps
+{
+    count: number,
+    data: Map<Mesh, [Solid3D, Solid3D]>;
+}
+
+@observer
+export class InterfereModal extends Component<IInterfereProps, {}> {
+    @observable currentIndex = -1;
+
+    render()
+    {
+        const { count, data } = this.props;
+
+        return (
+            <CommonModal
+                title="干涉检查"
+                icon="applications"
+                close={this.close}
+                hasConfig={false}
+                bodyStyle={{ width: 300 }}
+                footerStyle={{ width: "100%" }}
+                footerChildren={
+                    <Button
+                        className={Classes.INTENT_DANGER}
+                        text="关闭"
+                        onClick={this.close} />
+                }
+            >
+                <Card className="flex" style={{ padding: 10 }}>
+                    <div style={{ width: "60%", paddingRight: 10 }}>
+                        <h5>共{count}个干涉对象</h5>
+                        <div className="flex-between">
+                            <span>找到干涉点对</span>
+                            <span>{data.size}</span>
+                        </div>
+                    </div>
+                    <div className="flex-col" style={{ width: "40%" }}>
+                        <h5>亮显</h5>
+                        <Button
+                            text="上一个"
+                            intent={Intent.SUCCESS}
+                            onClick={this.previos}
+                        />
+                        <Button
+                            text="下一个"
+                            intent={Intent.SUCCESS}
+                            onClick={this.next}
+                        />{
+                            this.currentIndex >= 0 && <span>第{this.currentIndex + 1}个，共{data.size}个</span>
+                        }
+                    </div>
+                </Card>
+            </CommonModal>
+        );
+    }
+    private close = () =>
+    {
+        app.Editor.ModalManage.Clear();
+        app.Editor.ModalManage.EndCmd();
+        app.Viewer.OutlinePass.selectedObjects = [];
+    };
+    private restore = (os: Mesh[]) =>
+    {
+        for (let o of os)
+        {
+            let mat = o.material as MeshBasicMaterial;
+            mat.color = ColorMaterial.GetColor(1);
+        }
+        app.Viewer.OutlinePass.selectedObjects = [];
+    };
+    private next = () =>
+    {
+        let os = [...this.props.data.keys()];
+        this.restore(os);
+        this.currentIndex = FixIndex(this.currentIndex + 1, os.length);
+        this.update(os[this.currentIndex]);
+    };
+    private previos = () =>
+    {
+        let os = [...this.props.data.keys()];
+        this.restore(os);
+        this.currentIndex = FixIndex(this.currentIndex - 1, os.length);
+        this.update(os[this.currentIndex]);
+    };
+    private update = (o: Mesh) =>
+    {
+        let mat = o.material as MeshBasicMaterial;
+        mat.color = ColorMaterial.GetColor(3);
+        let box = new Box3();
+        app.Viewer.OutlinePass.selectedObjects = this.props.data.get(o).map(e =>
+        {
+            box.union(e.BoundingBox);
+            return e.DrawObject;
+        });
+        app.Viewer.CameraCtrl.ZoomExtensBox3(box);
+        app.Viewer.Zoom(1, box.getCenter(new Vector3));
+    };
+}
diff --git a/src/UI/Components/Modal/ModalContainer.tsx b/src/UI/Components/Modal/ModalContainer.tsx
index 8fff3b073..606d22cd2 100644
--- a/src/UI/Components/Modal/ModalContainer.tsx
+++ b/src/UI/Components/Modal/ModalContainer.tsx
@@ -1,4 +1,4 @@
-import React, { Component } from 'react'
+import React, { Component } from 'react';
 import { Icon, Button, Classes, IconName } from '@blueprintjs/core';
 import { UserConfig } from '../Board/UserConfig';
 import { IConfigStore } from '../../Store/BoardStore';
@@ -17,6 +17,8 @@ interface IModalProps
     footerChildren?: JSX.Element | (JSX.Element[]),
     type?: BoardModalType,
     bodyClass?: string;
+    bodyStyle?: React.CSSProperties;
+    footerStyle?: React.CSSProperties;
     containerEl?: (el) => void;
 }
 
@@ -30,7 +32,7 @@ export class CommonModal extends Component<IModalProps>{
                     icon={this.props.icon}
                     close={this.props.close}
                 />
-                <ModalBody className={this.props.bodyClass || ""}>
+                <ModalBody className={this.props.bodyClass || ""} bodyStyle={this.props.bodyStyle}>
                     {
                         this.props.children
                     }
@@ -38,13 +40,14 @@ export class CommonModal extends Component<IModalProps>{
                 <ModalFooter
                     hasConfig={this.props.hasConfig}
                     store={this.props.store}
+                    style={this.props.footerStyle}
                     type={this.props.type} >
                     {
                         this.props.footerChildren
                     }
                 </ModalFooter>
             </ModalContainer>
-        )
+        );
     }
 }
 
@@ -53,7 +56,7 @@ interface IModalContainer
     containerEl?: (el) => void;
     modalId?: string;
     className?: string;
-    children?: JSX.Element | JSX.Element[]
+    children?: JSX.Element | JSX.Element[];
 }
 
 export class ModalContainer extends Component<IModalContainer>
@@ -72,7 +75,7 @@ export class ModalContainer extends Component<IModalContainer>
                     }
                 </div>
             </div>
-        )
+        );
     }
 }
 
@@ -102,26 +105,34 @@ export class ModalHeader extends Component<IModalHeaderProps>
                     onClick={this.props.close}
                 />
             </div>
-        )
+        );
     }
 }
 
-export class ModalBody extends Component<{ children?: JSX.Element | JSX.Element[], className?: string }>
+interface IModalBodyProps
+{
+    bodyStyle?: React.CSSProperties;
+    children?: JSX.Element | JSX.Element[];
+    className?: string;
+}
+
+export class ModalBody extends Component<IModalBodyProps>
 {
     static defaultProps = {
         className: "",
-    }
+    };
     render()
     {
         return (
             <div
                 className={Classes.DIALOG_BODY + " " + this.props.className}
+                style={this.props.bodyStyle}
             >
                 {
                     this.props.children
                 }
             </div>
-        )
+        );
     }
 }
 
@@ -138,7 +149,7 @@ export class ModalFooter extends Component<IModalFooterProps>
 {
     static defaultProps = {
         hasConfig: true
-    }
+    };
     render()
     {
         return (
@@ -151,6 +162,6 @@ export class ModalFooter extends Component<IModalFooterProps>
                     {this.props.children}
                 </div>
             </div>
-        )
+        );
     }
 }