diff --git a/entry/src/main/ets/common/CustomEngineKeyImpl.ets b/entry/src/main/ets/common/CustomEngineKeyImpl.ets
index 60af07a..f780cd6 100644
--- a/entry/src/main/ets/common/CustomEngineKeyImpl.ets
+++ b/entry/src/main/ets/common/CustomEngineKeyImpl.ets
@@ -14,7 +14,7 @@
  */
 import { IEngineKey, ImageKnifeOption, PixelMapTransformation } from '@ohos/imageknife';
 import { SparkMD5 } from '@ohos/imageknife/src/main/ets/3rd_party/sparkmd5/spark-md5';
-import { ImageKnifeRequestSource } from '@ohos/imageknife/src/main/ets/ImageKnifeDispatcher';
+import { ImageKnifeRequestSource } from '@ohos/imageknife/src/main/ets/model/ImageKnifeData';
 
 //全局自定义key demo
 @Sendable
diff --git a/library/src/main/ets/ImageKnife.ets b/library/src/main/ets/ImageKnife.ets
index 94202f2..36f0262 100644
--- a/library/src/main/ets/ImageKnife.ets
+++ b/library/src/main/ets/ImageKnife.ets
@@ -13,11 +13,11 @@
  * limitations under the License.
  */
 import { ImageKnifeRequest } from './ImageKnifeRequest';
-import { ReadCacheStrategyType, ImageKnifeData } from './model/ImageKnifeData';
+import { ReadCacheStrategyType, ImageKnifeData, ImageKnifeRequestSource } from './model/ImageKnifeData';
 import { MemoryLruCache } from './utils/MemoryLruCache';
 import { IMemoryCache } from './utils/IMemoryCache'
 import { FileCache } from './utils/FileCache';
-import { ImageKnifeDispatcher, ImageKnifeRequestSource } from './ImageKnifeDispatcher';
+import { ImageKnifeDispatcher } from './ImageKnifeDispatcher';
 import { IEngineKey } from './key/IEngineKey';
 import { HeaderOptions, ImageKnifeOption } from './ImageKnifeOption';
 import { DefaultEngineKey } from './key/DefaultEngineKey';
@@ -56,6 +56,15 @@ export class ImageKnife {
     this.fileCache = new FileCache(context, size, memory)
     this.fileCache.initFileCache()
   }
+
+  /**
+   * 判断文件缓存是否初始化
+   * @returns 是否初始化
+   */
+  public isFileCacheInit(): boolean {
+    return this.fileCache === undefined ? false : this.fileCache.isFileCacheInit()
+  }
+
   /**
    * 全局添加单个请求头
    * @param key 请求头属性
diff --git a/library/src/main/ets/ImageKnifeDispatcher.ets b/library/src/main/ets/ImageKnifeDispatcher.ets
index 26c9047..7ca5780 100644
--- a/library/src/main/ets/ImageKnifeDispatcher.ets
+++ b/library/src/main/ets/ImageKnifeDispatcher.ets
@@ -19,7 +19,6 @@ import List from '@ohos.util.List';
 import LightWeightMap from '@ohos.util.LightWeightMap';
 import { LogUtil } from './utils/LogUtil';
 import buffer from '@ohos.buffer';
-import common from '@ohos.app.ability.common';
 import { FileCache } from './utils/FileCache';
 import fs from '@ohos.file.fs';
 import { ImageKnife } from './ImageKnife';
@@ -33,8 +32,7 @@ import { FileTypeUtil } from './utils/FileTypeUtil';
 import util from '@ohos.util';
 import { IEngineKey } from './key/IEngineKey';
 import { DefaultEngineKey } from './key/DefaultEngineKey';
-import { HeaderOptions } from './ImageKnifeOption';
-import { PixelMapTransformation } from './transform/PixelMapTransformation';
+import { ImageKnifeRequestWithSource , ImageKnifeRequestSource , RequestJobResult , RequestJobRequest } from './model/ImageKnifeData'
 
 export class ImageKnifeDispatcher {
   // 最大并发
@@ -116,7 +114,7 @@ export class ImageKnifeDispatcher {
       customGetImage: currentRequest.imageKnifeOption.customGetImage,
       onlyRetrieveFromCache: currentRequest.imageKnifeOption.onlyRetrieveFromCache,
       transformation:currentRequest.imageKnifeOption.transformation,
-      writeCacheStrategy: currentRequest.imageKnifeOption.writeCacheStrategy,
+      writeCacheStrategy: ImageKnife.getInstance().isFileCacheInit() ? currentRequest.imageKnifeOption.writeCacheStrategy : WriteCacheStrategyType.Memory, // 未初始化文件缓存时，不写文件缓存
       engineKey: this.engineKey,
       signature: currentRequest.imageKnifeOption.signature,
       requestSource
@@ -246,7 +244,7 @@ async function requestJob(request: RequestJobRequest): Promise<RequestJobResult
       LogUtil.log("customGetImage customGetImage");
       resBuf = await request.customGetImage(request.context, request.src)
       // 保存文件缓存
-      if (resBuf !== undefined) {
+      if (resBuf !== undefined && request.writeCacheStrategy !== WriteCacheStrategyType.Memory) {
         let copyBuf = buffer.concat([buffer.from(resBuf)]).buffer; // IDE有bug，不能直接获取resBuf.byteLength
         bufferSize = copyBuf.byteLength
         FileCache.saveFileCacheOnlyFile(request.context, fileKey, resBuf)
@@ -258,7 +256,7 @@ async function requestJob(request: RequestJobRequest): Promise<RequestJobResult
       if (request.src.indexOf("http://") == 0 || request.src.indexOf("https://") == 0) { //从网络下载
         // 先从文件缓存获取
         resBuf = FileCache.getFileCacheByFile(request.context, fileKey)
-        if (resBuf === undefined && request.onlyRetrieveFromCache != true && request.requestSource == 0) {
+        if (resBuf === undefined && request.onlyRetrieveFromCache != true && request.requestSource === ImageKnifeRequestSource.SRC) {
           let httpRequest = http.createHttp();
           let progress: number = 0
           const headerObj: Record<string,object> = {}
@@ -323,9 +321,9 @@ async function requestJob(request: RequestJobRequest): Promise<RequestJobResult
         }
       }
     } else if ((request.src as Resource).id !== undefined) { //从资源文件获取
-      if (resBuf == undefined && request.onlyRetrieveFromCache != true && request.requestSource == 0) {
+      if (resBuf == undefined && request.onlyRetrieveFromCache != true && request.requestSource == ImageKnifeRequestSource.SRC) {
         resBuf = request.context.resourceManager.getMediaContentSync((request.src as Resource).id).buffer as ArrayBuffer
-      } else if (resBuf == undefined  && request.requestSource != 0) {
+      } else if (resBuf == undefined  && request.requestSource != ImageKnifeRequestSource.SRC) {
         resBuf = request.context.resourceManager.getMediaContentSync((request.src as Resource).id).buffer as ArrayBuffer
       }
     }
@@ -362,7 +360,7 @@ async function requestJob(request: RequestJobRequest): Promise<RequestJobResult
     })
 
   // 图形变化
-  if (request.requestSource == 0 && request.transformation !== undefined) {
+  if (request.requestSource === ImageKnifeRequestSource.SRC && request.transformation !== undefined) {
     resPixelmap = await request.transformation?.transform(request.context, resPixelmap!, 0, 0)
   }
 
@@ -373,35 +371,3 @@ async function requestJob(request: RequestJobRequest): Promise<RequestJobResult
   };
 }
 
-
-export enum ImageKnifeRequestSource {
-  SRC,
-  PLACE_HOLDER,
-  ERROR_HOLDER
-}
-
-
-export interface ImageKnifeRequestWithSource {
-  request: ImageKnifeRequest
-  source: ImageKnifeRequestSource
-}
-
-interface RequestJobResult {
-  pixelMap: PixelMap | string | undefined
-  bufferSize: number
-  fileKey: string
-}
-
-interface RequestJobRequest {
-  context: common.UIAbilityContext,
-  src: string | PixelMap | Resource,
-  headers?:Array<HeaderOptions>,
-  allHeaders:Map<string,Object>,
-  customGetImage?: (context: Context, src: string | PixelMap | Resource) => Promise<ArrayBuffer | undefined>,
-  onlyRetrieveFromCache?: boolean
-  requestSource:ImageKnifeRequestSource
-  transformation?: PixelMapTransformation
-  writeCacheStrategy?: WriteCacheStrategyType
-  signature?: string
-  engineKey:IEngineKey
-}
diff --git a/library/src/main/ets/ImageKnifeRequest.ets b/library/src/main/ets/ImageKnifeRequest.ets
index 5fc173d..0c06e03 100644
--- a/library/src/main/ets/ImageKnifeRequest.ets
+++ b/library/src/main/ets/ImageKnifeRequest.ets
@@ -13,12 +13,8 @@
  * limitations under the License.
  */
 import { ImageKnifeOption } from './ImageKnifeOption';
-import { ImageKnifeData } from './model/ImageKnifeData';
-import { ImageKnife } from './ImageKnife'
 import common from '@ohos.app.ability.common';
-import { SparkMD5 } from './3rd_party/sparkmd5/spark-md5'
-import { LogUtil } from './utils/LogUtil'
-import { ImageKnifeRequestSource } from './ImageKnifeDispatcher';
+
 
 
 export class ImageKnifeRequest {
diff --git a/library/src/main/ets/key/DefaultEngineKey.ets b/library/src/main/ets/key/DefaultEngineKey.ets
index 8520701..b2d3600 100644
--- a/library/src/main/ets/key/DefaultEngineKey.ets
+++ b/library/src/main/ets/key/DefaultEngineKey.ets
@@ -16,7 +16,7 @@ import { SparkMD5 } from '../3rd_party/sparkmd5/spark-md5';
 import { ImageKnifeOption } from '../ImageKnifeOption';
 import { IEngineKey } from './IEngineKey';
 import { PixelMapTransformation } from '../transform/PixelMapTransformation';
-import { ImageKnifeRequestSource } from '../ImageKnifeDispatcher';
+import { ImageKnifeRequestSource } from '../model/ImageKnifeData';
 
 @Sendable
 export class DefaultEngineKey implements IEngineKey {
diff --git a/library/src/main/ets/key/IEngineKey.ets b/library/src/main/ets/key/IEngineKey.ets
index d8e949a..746df1b 100644
--- a/library/src/main/ets/key/IEngineKey.ets
+++ b/library/src/main/ets/key/IEngineKey.ets
@@ -12,8 +12,8 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-import { ImageKnifeRequestSource } from '../ImageKnifeDispatcher'
 import { ImageKnifeOption } from '../ImageKnifeOption'
+import { ImageKnifeRequestSource } from '../model/ImageKnifeData'
 
 export interface IEngineKey {
   // 生成内存缓存key
diff --git a/library/src/main/ets/model/ImageKnifeData.ets b/library/src/main/ets/model/ImageKnifeData.ets
index 3ac9632..2330aec 100644
--- a/library/src/main/ets/model/ImageKnifeData.ets
+++ b/library/src/main/ets/model/ImageKnifeData.ets
@@ -12,6 +12,12 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
+import { HeaderOptions } from '../ImageKnifeOption'
+import { ImageKnifeRequest } from '../ImageKnifeRequest'
+import { IEngineKey } from '../key/IEngineKey'
+import { PixelMapTransformation } from '../transform/PixelMapTransformation'
+import common from '@ohos.app.ability.common';
+
 export interface ImageKnifeData {
   source: PixelMap | string,
   imageWidth: number,
@@ -40,3 +46,44 @@ export enum WriteCacheStrategyType {
   File = 2
 }
 
+/**
+ * 区分是src,placehodler,还是error_holder
+ */
+export enum ImageKnifeRequestSource {
+  SRC,
+  PLACE_HOLDER,
+  ERROR_HOLDER
+}
+
+
+export interface ImageKnifeRequestWithSource {
+  request: ImageKnifeRequest
+  source: ImageKnifeRequestSource
+}
+
+/**
+ * request子线程处理时的返回
+ */
+export interface RequestJobResult {
+  pixelMap: PixelMap | string | undefined
+  bufferSize: number
+  fileKey: string
+}
+
+/**
+ * request子线程处理时的请求参数
+ */
+export interface RequestJobRequest {
+  context: common.UIAbilityContext,
+  src: string | PixelMap | Resource,
+  headers?: Array<HeaderOptions>,
+  allHeaders: Map<string, Object>,
+  customGetImage?: (context: Context, src: string | PixelMap | Resource) => Promise<ArrayBuffer | undefined>,
+  onlyRetrieveFromCache?: boolean
+  requestSource: ImageKnifeRequestSource
+  transformation?: PixelMapTransformation
+  writeCacheStrategy?: WriteCacheStrategyType
+  signature?: string
+  engineKey: IEngineKey
+}
+
diff --git a/library/src/main/ets/utils/FileCache.ets b/library/src/main/ets/utils/FileCache.ets
index 381096a..f8439eb 100644
--- a/library/src/main/ets/utils/FileCache.ets
+++ b/library/src/main/ets/utils/FileCache.ets
@@ -103,6 +103,10 @@ export class FileCache {
     this.isInited = true
   }
 
+  public isFileCacheInit():boolean {
+    return this.isInited
+  }
+
   // 添加缓存键值对,同时写文件
   put(key: string, value: ArrayBuffer): void {
     if (key == null || value == null) {