diff --git a/src/Add-on/DrawLine.ts b/src/Add-on/DrawLine.ts
index f7049a405..9cf69427a 100644
--- a/src/Add-on/DrawLine.ts
+++ b/src/Add-on/DrawLine.ts
@@ -40,6 +40,8 @@ export class DrawLine implements Command
             {
                 p2 = ptRes.Value;
                 let line = new Line();
+                line.ColorIndex = i++;
+
                 line.StartPoint = p1;
                 line.EndPoint = p2;
                 app.m_Database.ModelSpace.Append(line);
diff --git a/src/DatabaseServices/Entity.ts b/src/DatabaseServices/Entity.ts
index a7124aa01..fb7b5a6d0 100644
--- a/src/DatabaseServices/Entity.ts
+++ b/src/DatabaseServices/Entity.ts
@@ -13,6 +13,18 @@ export class Entity extends CADObject
     //材质id
     protected m_MaterialId: ObjectId;
     protected m_Color: number = 7;
+
+    set ColorIndex(v: number)
+    {
+        this.m_Color = v;
+        this.Update();
+    }
+    get ColorIndex(): number
+    {
+        return this.m_Color;
+    }
+
+
     //绘制一个threeJs对象.
     Draw(renderType: RenderType = RenderType.Wireframe): THREE.Object3D
     {
diff --git a/src/DatabaseServices/Line.ts b/src/DatabaseServices/Line.ts
index 09d85a9c9..4a0ba9dd6 100644
--- a/src/DatabaseServices/Line.ts
+++ b/src/DatabaseServices/Line.ts
@@ -37,7 +37,11 @@ export class Line extends Entity
     {
         for (let [, obj] of this.m_DrawEntity)
         {
-            let geo = (<THREE.Line>obj).geometry as THREE.Geometry;
+            let lineObj = (<THREE.Line>obj);
+
+            lineObj.material = ColorMaterial.GetLineMaterial(this.ColorIndex);
+
+            let geo = lineObj.geometry as THREE.Geometry;
 
             geo.vertices[0].copy(this.startPoint);
             geo.vertices[1].copy(this.endPoint);