diff --git a/library/index.ets b/library/index.ets
index 8c8c490..15f86a3 100644
--- a/library/index.ets
+++ b/library/index.ets
@@ -133,4 +133,4 @@ export { IDrawLifeCycle } from './src/main/ets/components/imageknife/interface/I
 export { LogUtil } from './src/main/ets/components/imageknife/utils/LogUtil'
 /*下采样*/
 export {Downsampler} from './src/main/ets/components/imageknife/Downsampling/Downsampler'
-export {DownsampleNone} from './src/main/ets/components/imageknife/Downsampling/DownsampleStartegy'
\ No newline at end of file
+export {DownsampleNone,FitCenter as fitter} from './src/main/ets/components/imageknife/Downsampling/DownsampleStartegy'
\ No newline at end of file
diff --git a/library/src/main/ets/components/imageknife/Downsampling.rar b/library/src/main/ets/components/imageknife/Downsampling.rar
deleted file mode 100644
index 7e8a162..0000000
Binary files a/library/src/main/ets/components/imageknife/Downsampling.rar and /dev/null differ