diff --git a/src/composables/usePresignedUpload.ts b/src/composables/usePresignedUpload.ts
index 1852395..bd3e153 100644
--- a/src/composables/usePresignedUpload.ts
+++ b/src/composables/usePresignedUpload.ts
@@ -74,7 +74,6 @@ export function usePresignedUpload() {
   const isError = computed(() => presignStatus.value === PRESIGN_UPLOAD_STATUS.ERROR)
   const currentMode = computed<PresignUploadMode | null>(() => uploadSession.value?.mode ?? null)
 
-
   /**
    * 文件大小验证
    */
@@ -144,7 +143,6 @@ export function usePresignedUpload() {
     alertStore.showAlert(errorMessage.value, 'error')
   }
 
-
   /**
    * 初始化上传会话
    */
@@ -224,7 +222,6 @@ export function usePresignedUpload() {
     }
   }
 
-
   /**
    * 代理模式上传
    */
@@ -263,30 +260,19 @@ export function usePresignedUpload() {
     }
   }
 
-  /**
-   * 上传文件（主入口方法）
-   * 根据 mode 自动选择直传或代理上传
-   */
-  const uploadFile = async (
-    file: File,
-    options?: PresignUploadOptions
-  ): Promise<string | null> => {
-    // 重置状态
+  const uploadFile = async (file: File, options?: PresignUploadOptions): Promise<string | null> => {
     reset()
 
-    // 验证文件大小
     if (!validateFileSize(file)) {
       presignStatus.value = PRESIGN_UPLOAD_STATUS.ERROR
       return null
     }
 
-    // 初始化上传会话
     const session = await initUploadSession(file, options)
     if (!session) {
       return null
     }
 
-    // 根据模式选择上传方式
     if (session.mode === 'direct') {
       return await uploadDirect(file, session, options)
     } else {
@@ -294,7 +280,6 @@ export function usePresignedUpload() {
     }
   }
 
-
   /**
    * 取消上传
    */
diff --git a/src/types/index.ts b/src/types/index.ts
index 6dfd698..00169ab 100644
--- a/src/types/index.ts
+++ b/src/types/index.ts
@@ -179,7 +179,6 @@ export interface RouteConfig {
   }
 }
 
-
 // ==================== 预签名上传相关类型 ====================
 
 // 预签名上传模式
diff --git a/src/views/SendFileView.vue b/src/views/SendFileView.vue
index cd265d7..dc886fd 100644
--- a/src/views/SendFileView.vue
+++ b/src/views/SendFileView.vue
@@ -1029,16 +1029,10 @@ const handleSubmit = async () => {
     let response: ApiResponse
 
     if (sendType.value === 'file') {
-      // 优先使用预签名上传，如果失败则回退到其他方式
-      try {
+      if (config.enableChunk) {
+        response = await handleChunkUpload(selectedFile.value!)
+      } else {
         response = await handlePresignedUpload(selectedFile.value!)
-      } catch {
-        // 预签名上传失败，回退到切片上传或默认上传
-        if (config.enableChunk) {
-          response = await handleChunkUpload(selectedFile.value!)
-        } else {
-          response = await handleDefaultFileUpload(selectedFile.value!)
-        }
       }
     } else {
       // 文本上传保持不变