diff --git a/library/src/main/ets/ImageKnifeDispatcher.ets b/library/src/main/ets/ImageKnifeDispatcher.ets
index dfabd32..a6009f3 100644
--- a/library/src/main/ets/ImageKnifeDispatcher.ets
+++ b/library/src/main/ets/ImageKnifeDispatcher.ets
@@ -32,6 +32,7 @@ import taskpool from '@ohos.taskpool';
 import { FileTypeUtil } from './utils/FileTypeUtil';
 import util from '@ohos.util';
 import { Tools } from './utils/Tools';
+import { SparkMD5 } from './3rd_party/sparkmd5/spark-md5';
 
 export class ImageKnifeDispatcher {
   // 最大并发
@@ -41,10 +42,43 @@ export class ImageKnifeDispatcher {
   // 执行中的请求
   executingJobMap: LightWeightMap<string, List<ImageKnifeRequestWithSource>> = new LightWeightMap();
 
+  private keyCache: util.LRUCache<string,string> = new util.LRUCache(1024)
+
+  showFromMemomry(request: ImageKnifeRequest,imageSrc: string | PixelMap | Resource, requestSource: ImageKnifeRequestSource): boolean {
+    let memoryCache: ImageKnifeData | undefined = ImageKnife.getInstance()
+      .loadFromMemoryCache(Tools.generateKey(imageSrc))
+    if (memoryCache !== undefined) {
+      // 画主图
+      if (request.requestState === ImageKnifeRequestState.PROGRESS) {
+        request.ImageKnifeRequestCallback?.showPixelMap(request.componentVersion, memoryCache.source)
+
+        if (requestSource == ImageKnifeRequestSource.SRC) {
+          request.requestState = ImageKnifeRequestState.COMPLETE
+        } else if (requestSource == ImageKnifeRequestSource.ERROR_HOLDER) {
+          request.requestState = ImageKnifeRequestState.ERROR
+        }
+      }
+      return true
+    }
+    return false
+  }
+
+  // 生成唯一的key
+  generateKey(key: string | PixelMap | Resource): string {
+    let keyCache = typeof key == "string"? key : JSON.stringify(key)
+    let result = this.keyCache.get(keyCache)
+    if(result != undefined) {
+      return result
+    } else {
+      result = SparkMD5.hashBinary(keyCache)
+      this.keyCache.put(keyCache,result)
+      return result
+    }
+  }
   enqueue(request: ImageKnifeRequest): void {
 
     //1.内存有的话直接渲染
-    if (request.showFromMemomry(request.ImageKnifeOption.loadSrc, ImageKnifeRequestSource.SRC)) {
+    if (this.showFromMemomry(request,request.ImageKnifeOption.loadSrc, ImageKnifeRequestSource.SRC)) {
       return
     }
 
@@ -59,7 +93,7 @@ export class ImageKnifeDispatcher {
   executeJob(request: ImageKnifeRequest): void {
     // 加载占位符
     if (request.ImageKnifeOption.placeholderSrc !== undefined) {
-      if (request.showFromMemomry(request.ImageKnifeOption.placeholderSrc, ImageKnifeRequestSource.PLACE_HOLDER) === false) {
+      if (this.showFromMemomry(request,request.ImageKnifeOption.placeholderSrc, ImageKnifeRequestSource.PLACE_HOLDER) === false) {
         this.getAndShowImage(request, request.ImageKnifeOption.placeholderSrc, ImageKnifeRequestSource.PLACE_HOLDER)
       }
     }
@@ -107,7 +141,7 @@ export class ImageKnifeDispatcher {
           requestList.forEach((requestWithSource: ImageKnifeRequestWithSource) => {
             if (requestWithSource.source === ImageKnifeRequestSource.SRC && currentRequest.ImageKnifeOption.errorholderSrc !== undefined) {
 
-              if (currentRequest.showFromMemomry(currentRequest.ImageKnifeOption.errorholderSrc, ImageKnifeRequestSource.ERROR_HOLDER) === false) {
+              if (this.showFromMemomry(currentRequest,currentRequest.ImageKnifeOption.errorholderSrc, ImageKnifeRequestSource.ERROR_HOLDER) === false) {
                 this.getAndShowImage(currentRequest, currentRequest.ImageKnifeOption.errorholderSrc, ImageKnifeRequestSource.ERROR_HOLDER)
               }
             }
diff --git a/library/src/main/ets/ImageKnifeRequest.ets b/library/src/main/ets/ImageKnifeRequest.ets
index 45c5582..892bf43 100644
--- a/library/src/main/ets/ImageKnifeRequest.ets
+++ b/library/src/main/ets/ImageKnifeRequest.ets
@@ -44,31 +44,6 @@ export class ImageKnifeRequest {
     this.componentVersion = version
     this.ImageKnifeRequestCallback = ImageKnifeRequestCallback
   }
-
-  showFromMemomry(imageSrc: string | PixelMap | Resource, requestSource: ImageKnifeRequestSource): boolean {
-    let memoryCache: ImageKnifeData | undefined = ImageKnife.getInstance()
-      .loadFromMemoryCache(Tools.generateKey(this.ImageKnifeOption.loadSrc))
-    if (memoryCache !== undefined) {
-      // 画主图
-      if (this.requestState === ImageKnifeRequestState.PROGRESS) {
-        this.ImageKnifeRequestCallback?.showPixelMap(this.componentVersion, memoryCache.source)
-
-        if (requestSource == ImageKnifeRequestSource.SRC) {
-          this.requestState = ImageKnifeRequestState.COMPLETE
-        } else if (requestSource == ImageKnifeRequestSource.ERROR_HOLDER) {
-          this.requestState = ImageKnifeRequestState.ERROR
-        }
-      }
-      return true
-    }
-    return false
-  }
-
-  // 生成唯一的key
-  generateKey(key: string | PixelMap | Resource): string {
-    // todo 补充变换
-    return SparkMD5.hashBinary(JSON.stringify(key)) as string
-  }
 }
 
 export enum ImageKnifeRequestState {