diff --git a/entry/src/main/ets/pages/DownsamplingPage.ets b/entry/src/main/ets/pages/DownsamplingPage.ets
index 1715e5f..213401c 100644
--- a/entry/src/main/ets/pages/DownsamplingPage.ets
+++ b/entry/src/main/ets/pages/DownsamplingPage.ets
@@ -14,6 +14,7 @@
  */
 import { FitCenter, ImageKnifeComponent,
   ImageKnifeData,
+  ImageKnifeGlobal,
   ImageKnifeOption, RequestOption } from '@ohos/libraryimageknife'
 import { BusinessError } from '@ohos.base'
 import { DownsampleNone } from '@ohos/imageknife/src/main/ets/components/imageknife/Downsampling/DownsampleStartegy';
@@ -114,7 +115,7 @@ struct DownsamplingPage {
 
   //正方形裁剪
   transformSquare() {
-    let imageKnifeOption = new RequestOption();
+    let imageKnifeOption:RequestOption  = new RequestOption();
     imageKnifeOption.load(mUrl)
       .addListener({ callback: (err: BusinessError | string, data: ImageKnifeData) => {
         this.mSquarePixelMap = data.drawPixelMap?.imagePixelMap as PixelMap;
@@ -125,7 +126,7 @@ struct DownsamplingPage {
   }
 
   transformSquare1() {
-    let imageKnifeOption = new RequestOption();
+    let imageKnifeOption:RequestOption = new RequestOption();
     imageKnifeOption.load(mUrl)
       .addListener({ callback: (err: BusinessError | string, data: ImageKnifeData) => {
         this.mSquarePixelMap1 = data.drawPixelMap?.imagePixelMap as PixelMap;
@@ -138,4 +139,4 @@ struct DownsamplingPage {
   }
 }
 
-let ImageKnife = ImageKnifeGlobal.getInstance().getImageKnife();
\ No newline at end of file
+let ImageKnife :RequestOption = ImageKnifeGlobal.getInstance().getImageKnife();
\ No newline at end of file