diff --git a/README.md b/README.md
index c1cc5497d68ddee882963987bb331ca128199ecf..31c138369eeabe78fcea2f3250f10e50eb55f82f 100644
--- a/README.md
+++ b/README.md
@@ -151,6 +151,35 @@ import { VTableController, setZoom } from '@ohos/vtable';
 this.vTableController.setZoom(true)
 ```
 
+####  setDiagonal
+Add diagonal lines
+```typescript
+import { VTableController,setDiagonal } from '@ohos/vtable';
+
+@State vTableController: VTableController = new VTableController();
+this.vTableController.setDiagonal(
+                Math.min(this.mergeCellParams[0], this.mergeCellParams[2]),
+                Math.min(this.mergeCellParams[1], this.mergeCellParams[3]),
+                Math.max(this.mergeCellParams[0], this.mergeCellParams[2]),
+                Math.max(this.mergeCellParams[1], this.mergeCellParams[3])
+              )
+```
+
+#### deleteDiagonal
+Remove diagonal line
+```typescript
+import { VTableController,deleteDiagonal } from '@ohos/vtable';
+
+@State vTableController: VTableController = new VTableController();
+this.vTableController.deleteDiagonal(
+                Math.min(this.mergeCellParams[0], this.mergeCellParams[2]),
+                Math.min(this.mergeCellParams[1], this.mergeCellParams[3]),
+                Math.max(this.mergeCellParams[0], this.mergeCellParams[2]),
+                Math.max(this.mergeCellParams[1], this.mergeCellParams[3])
+              )
+```
+
+
 ## API Documentation
 ### Interfaces
 
@@ -173,6 +202,8 @@ this.vTableController.setZoom(true)
 | renderWithRecreateCells | None                                                                                                                               | Re-render table                              |
 | setZoom                 | isMagnify: boolean                                                                                                                 | Zoom (true for zoom in, false for zoom out)  |
 | release                 | None                                                                                                                               | Release resources                            |
+| setDiagonal             | startCol: number, startRow: number, endCol: number, endRow: number                                                                 | Set diagonal line                             |
+| deleteDiagonal          | startCol: number, startRow: number, endCol: number, endRow: number                                                                 | Remove diagonal line                         |
 
 ## Constraints and Limitations
 
diff --git a/README_zh.md b/README_zh.md
index edab67a204212de1e135d0219dccb0006ab1dd54..9d8a9f9b6c161db564af7099818433683ebc1f15 100644
--- a/README_zh.md
+++ b/README_zh.md
@@ -153,6 +153,34 @@ import { VTableController,setZoom } from '@ohos/vtable';
 this.vTableController.setZoom(true)
 ```
 
+####  setDiagonal
+添加斜线
+```typescript
+import { VTableController,setDiagonal } from '@ohos/vtable';
+
+@State vTableController: VTableController = new VTableController();
+this.vTableController.setDiagonal(
+                Math.min(this.mergeCellParams[0], this.mergeCellParams[2]),
+                Math.min(this.mergeCellParams[1], this.mergeCellParams[3]),
+                Math.max(this.mergeCellParams[0], this.mergeCellParams[2]),
+                Math.max(this.mergeCellParams[1], this.mergeCellParams[3])
+              )
+```
+
+#### deleteDiagonal
+删除斜线
+```typescript
+import { VTableController,deleteDiagonal } from '@ohos/vtable';
+
+@State vTableController: VTableController = new VTableController();
+this.vTableController.deleteDiagonal(
+                Math.min(this.mergeCellParams[0], this.mergeCellParams[2]),
+                Math.min(this.mergeCellParams[1], this.mergeCellParams[3]),
+                Math.max(this.mergeCellParams[0], this.mergeCellParams[2]),
+                Math.max(this.mergeCellParams[1], this.mergeCellParams[3])
+              )
+```
+
 ## 接口说明
 ### 接口
 
@@ -175,6 +203,8 @@ this.vTableController.setZoom(true)
 | renderWithRecreateCells | 无                                                                       | 重新渲染表格                            |
 | setZoom                 | isMagnify: boolean                                                       | 缩放，true是放大，false是缩小            |
 | release                 | 无                                                                       | 释放                                    |
+| setDiagonal             | startCol: number, startRow: number, endCol: number, endRow: number      | 添加斜线                                |
+| deleteDiagonal          | startCol: number, startRow: number, endCol: number, endRow: number      | 删除斜线                                |