diff --git a/src/helpers.ts b/src/helpers.ts
index da6ceae..06b5f8c 100644
--- a/src/helpers.ts
+++ b/src/helpers.ts
@@ -219,11 +219,14 @@ export function prepare(
     })
     Object.keys(fileData).forEach(key => {
       const options = (requestData[key] as FileData).getOptions()
-      formData.append(
-        key,
-        fileData[key],
-        useNativeFormData ? options?.filename : (options as any),
-      )
+      const files = Array.isArray(fileData[key]) ? fileData[key] : [fileData[key]]
+      files.forEach((file: Blob) => {
+        formData.append(
+          key,
+          file,
+          useNativeFormData ? options?.filename : (options as any),
+        )
+      })
     })
     return formData as any
   }
diff --git a/tests/__snapshots__/helpers.test.ts.snap b/tests/__snapshots__/helpers.test.ts.snap
index 8d1e8b9..32c8cd4 100644
--- a/tests/__snapshots__/helpers.test.ts.snap
+++ b/tests/__snapshots__/helpers.test.ts.snap
@@ -155,6 +155,28 @@ Object {
 }
 `;
 
+exports[`prepare 文件处理: file-multiple 1`] = `
+Array [
+  Array [
+    "file",
+    "text1",
+  ],
+  Array [
+    "file",
+    "text2",
+  ],
+]
+`;
+
+exports[`prepare 文件处理: file-single 1`] = `
+Array [
+  Array [
+    "file",
+    "text1",
+  ],
+]
+`;
+
 exports[`prepare 查询参数支持数组: brackets 1`] = `
 Object {
   "allData": Object {},
diff --git a/tests/helpers.test.ts b/tests/helpers.test.ts
index 3fe410a..839c666 100644
--- a/tests/helpers.test.ts
+++ b/tests/helpers.test.ts
@@ -176,4 +176,47 @@ describe('prepare', () => {
       ),
     ).toMatchSnapshot('json')
   })
+
+  test('文件处理', async () => {
+    const payload = prepare(
+      { path: '/test' } as Partial<RequestConfig> as any,
+      {
+        file: new FileData(
+          new Blob(['1'], {
+            type: 'text1',
+          }),
+        ),
+      },
+    )
+    const files: any[] = []
+    payload.getFormData().forEach((v, k) => {
+      files.push([k, v])
+    })
+    for (const file of files) {
+      file[1] = file[1] instanceof File ? file[1].type : file[1]
+    }
+    expect(files).toMatchSnapshot('file-single')
+
+    const payload2 = prepare(
+      { path: '/test' } as Partial<RequestConfig> as any,
+      {
+        file: new FileData([
+          new Blob(['1'], {
+            type: 'text1',
+          }),
+          new Blob(['2'], {
+            type: 'text2',
+          }),
+        ]),
+      },
+    )
+    const files2: any[] = []
+    payload2.getFormData().forEach((v, k) => {
+      files2.push([k, v])
+    })
+    for (const file of files2) {
+      file[1] = file[1] instanceof File ? file[1].type : file[1]
+    }
+    expect(files2).toMatchSnapshot('file-multiple')
+  })
 })