diff --git a/src/Add-on/DrawLine.ts b/src/Add-on/DrawLine.ts
index bfcbbcbfa..d42bd8289 100644
--- a/src/Add-on/DrawLine.ts
+++ b/src/Add-on/DrawLine.ts
@@ -1,5 +1,5 @@
 import * as THREE from 'three';
-import { Vector3 } from 'three';
+import { Vector3, Vector2 } from 'three';
 
 import { app } from '../ApplicationServices/Application';
 import { Circle } from '../DatabaseServices/Circle';
@@ -8,6 +8,7 @@ import { Command } from '../Editor/CommandMachine';
 import { PromptStatus } from '../Editor/PromptResult';
 import { RenderType } from '../GraphicsSystem/Enum';
 import { Ellipse } from '../DatabaseServices/Ellipse';
+import { Spline } from '../DatabaseServices/Spline';
 
 export class DrawLine implements Command
 {
@@ -281,6 +282,60 @@ export class DrawEllipse implements Command
 
     }
 }
+export class DrawSpline implements Command
+{
+    async exec()
+    {
+        app.m_Editor.m_CommandStore.Prompt("请输入一个点:");
+        let ptRes = await app.m_Editor.GetPoint({ Msg: "请输入第一个点:" });
+
+        if (ptRes.Status != PromptStatus.OK)
+        {
+            return;
+        }
+        let i = 0;
+        let p1 = ptRes.Value;
+
+        let pts = [];
+        let ptLast = new Vector2(p1.x, p1.y);
+        pts.push(ptLast);
+        let spline = new Spline(pts);
+
+        while (true)
+        {
+            app.m_Editor.m_CommandStore.Prompt("请输入点2:");
+            ptRes = await app.m_Editor.GetPoint({
+                Msg: "请输入点2:",
+                BasePoint: p1,
+                AllowDrawRubberBand: true,
+                KeyWordList: [{ msg: "放弃", key: "U" }],
+                Callback: (v) =>
+                {
+                    let p = new Vector2(v.x, v.y);
+                    let tmpPts = pts.slice(0);
+                    tmpPts.push(p);
+                    spline.Points = tmpPts;
+                }
+            });
+
+            if (ptRes.Status == PromptStatus.OK)
+            {
+                ptLast = new Vector2(ptRes.Value.x, ptRes.Value.y);
+                app.m_Database.ModelSpace.Append(spline);
+                pts.push(ptLast);
+                p1 = ptRes.Value;
+                spline.Points = pts;
+                continue;
+            }
+            else
+            {
+                break;
+            }
+        }
+
+
+    }
+}
 export class DrawTest implements Command
 {
     async exec()
diff --git a/src/DatabaseServices/Spline.ts b/src/DatabaseServices/Spline.ts
new file mode 100644
index 000000000..335e7f14f
--- /dev/null
+++ b/src/DatabaseServices/Spline.ts
@@ -0,0 +1,52 @@
+import { Entity } from "./Entity";
+import { Vector2, Geometry } from "three";
+import * as THREE from "three";
+import { RenderType } from "../GraphicsSystem/Enum";
+import { ColorMaterial } from "../Common/ColorPalette";
+
+export class Spline extends Entity
+{
+    m_Points: Vector2[];
+    constructor(points: Vector2[])
+    {
+        super();
+        this.m_Points = points;
+    }
+    get Points()
+    {
+        return this.m_Points;
+    }
+    set Points(v: Vector2[])
+    {
+        this.m_Points = v;
+        this.Update();
+    }
+    Draw(renderType: RenderType): THREE.Object3D
+    {
+        let obj = super.Draw(renderType);
+        if (obj) return obj;
+        // let line = new THREE.Line(geo);
+        let curve = new THREE.SplineCurve(this.Points);
+        let points = curve.getPoints(1000);
+        let geometry = new THREE.Geometry().setFromPoints(points);
+
+        // Create the final object to add to the scene
+        let splineObject = new THREE.Line(geometry, ColorMaterial.GetLineMaterial(this.m_Color));
+        this.m_DrawEntity.set(renderType, splineObject);
+        splineObject.userData = this;
+        return splineObject;
+    }
+    Update()
+    {
+        for (let [, obj] of this.m_DrawEntity)
+        {
+            let geo = obj["geometry"] as Geometry;
+
+            let curve = new THREE.SplineCurve(this.Points);
+            geo.setFromPoints(curve.getPoints(1000));
+
+            geo.verticesNeedUpdate = true;
+            geo.computeBoundingSphere();
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/Editor/CommandRegister.ts b/src/Editor/CommandRegister.ts
index d281914eb..264bef7f4 100644
--- a/src/Editor/CommandRegister.ts
+++ b/src/Editor/CommandRegister.ts
@@ -1,7 +1,7 @@
 // import { Command_DrawBoard } from '../Add-on/DrawBoard';
 // import { DrawFloor } from '../Add-on/DrawFloor';
 import { DrawGripStretch } from '../Add-on/DrawGripStretch';
-import { DrawCircle, DrawLine, DrawRect, DrawSphere, DrawTest, ZoomE, DrawEllipse } from '../Add-on/DrawLine';
+import { DrawCircle, DrawLine, DrawRect, DrawSphere, DrawTest, ZoomE, DrawEllipse, DrawSpline } from '../Add-on/DrawLine';
 import { DrawCircle0 } from '../Add-on/DrawZeroCircle';
 import { Command_Erase } from '../Add-on/Erase';
 import { Fbx } from '../Add-on/loadfbx';
@@ -28,6 +28,7 @@ export function registerCommand()
     commandMachine.RegisterCommand("rec", new DrawRect())
     commandMachine.RegisterCommand("c", new DrawCircle())
     commandMachine.RegisterCommand("el", new DrawEllipse())
+    commandMachine.RegisterCommand("spl", new DrawSpline())
 
     commandMachine.RegisterCommand("t", new DrawTest())
     commandMachine.RegisterCommand("m", new Command_Move())
diff --git a/src/GraphicsSystem/Viewer.ts b/src/GraphicsSystem/Viewer.ts
index ce127466b..d183371de 100644
--- a/src/GraphicsSystem/Viewer.ts
+++ b/src/GraphicsSystem/Viewer.ts
@@ -10,6 +10,7 @@ import { CameraControl } from './CameraControl';
 import { RenderType } from './Enum';
 import { GripScene } from './GripScene';
 import { PreViewer } from './PreViewer';
+import { Vector3, Geometry } from 'three';
 
 //导入其他js模块
 require("three-CopyShader");
@@ -115,6 +116,9 @@ export class Viewer
         this.m_Composer.addPass(this.m_effectFXAA);
 
         this.onSize();
+
+
+
     }
 
     onSize = (width?, height?) =>