diff --git a/.env.development b/.env.development
index 9a12f629..101171d8 100644
--- a/.env.development
+++ b/.env.development
@@ -3,5 +3,6 @@ ENV = 'development'
 # 'development'
 
 # base api
-# VITE_APP_BASE_API_Url = 'http://25.18.122.66:9786'
-VITE_APP_BASE_API_Url = 'http://25.64.16.133:9786'
+VITE_APP_BASE_API_Url = 'http://25.18.122.66:9786'
+# 苗扬
+# VITE_APP_BASE_API_Url = 'http://25.64.16.133:9786' 
diff --git a/src/api/common.js b/src/api/common.js
index 2e8954f6..871eb002 100644
--- a/src/api/common.js
+++ b/src/api/common.js
@@ -7,8 +7,6 @@ import {
 
 
 export const uploadFile = (file, data) => {  
-
-	
     const url = '/plimg/fileUpload/stuMgrUploadImg';  
     const base_url = get_base_url(url);  
     const token = getToken();  
@@ -43,19 +41,23 @@ export const uploadFile = (file, data) => {
 
 
 // 对象存储预览 /traoss/tras3/show/{文件ID}
-export function previewFile(id,responseType = 'blob') {
+export function previewFile(id,responseType = 'arraybuffer') {
     const token = getToken();  
-    const header = {};  
+    const header = {
+			"Content-Type": "application/x-www-form-urlencoded; charset=UTF-8",
+		};  
     if (token) 
         header['summary'] = token
+    let baseUrl = get_base_url();  
 	
 	return new Promise((resolve, reject) => {  
 		uni.request({  
-			url: `/traoss/tras3/show/${id}`,  
+			url: `${baseUrl}/traoss/tras3/show/${id}`,  
 			header,  
 			responseType,
 			success(result) {  
-				resolve(result.data)
+				let _blob = new Blob([result.data],{type:result.header['content-type'].split(';')[0]})
+				resolve(_blob)
 			},  
 			fail(error) {    
 				reject(new Error('Upload failed'));  
diff --git a/src/components/course-item/course-item.vue b/src/components/course-item/course-item.vue
index 90bfafdf..a6573f9a 100644
--- a/src/components/course-item/course-item.vue
+++ b/src/components/course-item/course-item.vue
@@ -57,6 +57,8 @@
 		height: 170rpx;
 		float: left;
 		position: relative;
+		border-radius: 20rpx;
+		overflow: hidden;
 		.img-box{
 			width: 170rpx;
 			height: 170rpx;
diff --git a/src/components/image-preview/image-preview.vue b/src/components/image-preview/image-preview.vue
index 8bb646ba..b878aaeb 100644
--- a/src/components/image-preview/image-preview.vue
+++ b/src/components/image-preview/image-preview.vue
@@ -1,5 +1,5 @@
 <template>
-	<image :src="imgUrlShow"></image>
+	<image :src="imgUrlShow" fit="cover"></image>
 	<!-- <image class="img" src="@/static/images/test/1.png"></image> -->
 </template>
 
@@ -42,6 +42,7 @@
 			getPreviewUrlBlob(id) {
 				// this.imgUrlShow = '@/static/images/index/message_b.png'
 				previewFile(id).then((res) => {
+					console.log(res)
 					this.imgUrlShow = URL.createObjectURL(res);
 					// const reader = new FileReader();
 					// reader.readAsDataURL(res)