diff --git a/src/configs/lines.ts b/src/configs/lines.ts
index 425bdce9..0237dfe0 100644
--- a/src/configs/lines.ts
+++ b/src/configs/lines.ts
@@ -1,12 +1,20 @@
+import { LinePoint } from '@/types/slides'
+
+
 export interface LinePoolItem {
   path: string;
-  style: string;
-  points: [string, string];
+  style: 'solid' | 'dashed';
+  points: [LinePoint, LinePoint];
   isBroken?: boolean;
   isCurve?: boolean;
 }
 
-export const LINE_LIST = [
+interface PresetLine {
+  type: string;
+  children: LinePoolItem[];
+}
+
+export const LINE_LIST: PresetLine[] = [
   {
     type: '直线',
     children: [
diff --git a/src/types/slides.ts b/src/types/slides.ts
index 2bd581ea..97496b99 100644
--- a/src/types/slides.ts
+++ b/src/types/slides.ts
@@ -286,6 +286,8 @@ export interface PPTShapeElement extends PPTBaseElement {
 }
 
 
+export type LinePoint = '' | 'arrow' | 'dot' 
+
 /**
  * 线条元素
  * 
@@ -311,9 +313,9 @@ export interface PPTLineElement extends Omit<PPTBaseElement, 'height'> {
   type: 'line';
   start: [number, number];
   end: [number, number];
-  style: string;
+  style: 'solid' | 'dashed';
   color: string;
-  points: [string, string];
+  points: [LinePoint, LinePoint];
   shadow?: PPTElementShadow;
   broken?: [number, number];
   curve?: [number, number];