diff --git a/README.md b/README.md
index d16758c..0a89eb2 100644
--- a/README.md
+++ b/README.md
@@ -130,6 +130,10 @@ imgCdn 语雀图片转图床配置说明
 > 
 > 例如 'host': `upyun.1874.cool`或 `https://upyun.1874.cool ` 
 
+> Github图床的默认域名是`raw.githubusercontent.com`，如果要使用jsdelivr进行加速，可以配置`host`为`cdn.jsdelivr.net`，
+> 
+> 例如 'host': `cdn.jsdelivr.net`
+
 > bucket和region说明
 > 
 > [获取腾讯云的bucket和region](https://console.cloud.tencent.com/cos/bucket)，示例：{ bucket: "blog", region: "ap-guangzhou" }
diff --git a/util/imageBeds/github.js b/util/imageBeds/github.js
index 9669d3b..78b1d9c 100644
--- a/util/imageBeds/github.js
+++ b/util/imageBeds/github.js
@@ -12,6 +12,18 @@ const secretKey = process.env.SECRET_KEY;
 class GithubClient {
   constructor(config) {
     this.config = config;
+    this.init();
+  }
+
+  init() {
+    if (!this.config.host) {
+      out.warn('未指定加速域名，将使用默认域名：https://raw.githubusercontent.com');
+    }
+    // 如果指定了加速域名
+    if (this.config.host && this.config.host.includes('cdn.jsdelivr.net')) {
+      this.config.host = 'https://cdn.jsdelivr.net';
+      out.info(`图床域名：${this.config.host}`);
+    }
   }
 
   static getInstance(config) {
@@ -39,10 +51,16 @@ class GithubClient {
           Authorization: `token ${secretKey}`,
         },
       });
-      if (result.status === 200) {
-        return result.data.download_url;
+      if (result.status === 200 || result.status === 201) {
+        if (this.config.host) {
+          return `${this.config.host}/gh/${secretId}/${this.config.bucket}/${this.config.prefixKey}/${fileName}`;
+        }
+        if (method === 'GET') {
+          return result.data.download_url;
+        }
+        return result.data.content.download_url;
       }
-      out.warn(`请求图片失败，请检查: ${transformRes(result)}`);
+      method === 'PUT' && out.warn(`请求图片失败，请检查: ${transformRes(result)}`);
       return '';
     } catch (error) {
       out.warn(`请求图片失败，请检查: ${transformRes(error)}`);
@@ -78,6 +96,7 @@ class GithubClient {
       const base64File = imgBuffer.toString('base64');
       const imgUrl = await this._fetch('PUT', fileName, base64File);
       if (imgUrl) return imgUrl;
+      out.error('上传图片失败，请检查');
       process.exit(-1);
     } catch (e) {
       out.error(`上传图片失败，请检查: ${transformRes(e)}`);
diff --git a/util/imageBeds/qiniu.js b/util/imageBeds/qiniu.js
index 7c7ce5c..d3d7df7 100644
--- a/util/imageBeds/qiniu.js
+++ b/util/imageBeds/qiniu.js
@@ -19,6 +19,7 @@ class QiniuClient {
       out.error('使用七牛云时，需要在imgCdn中指定域名host');
       process.exit(-1);
     }
+    out.info(`图床域名：${this.config.host}`);
     const mac = new qiniu.auth.digest.Mac(secretId, secretKey);
     const putPolicy = new qiniu.rs.PutPolicy({ scope: this.config.bucket }); // 配置
     this.uploadToken = putPolicy.uploadToken(mac); // 获取上传凭证
diff --git a/util/imageBeds/upyun.js b/util/imageBeds/upyun.js
index 4f1b436..a6779ee 100644
--- a/util/imageBeds/upyun.js
+++ b/util/imageBeds/upyun.js
@@ -21,6 +21,7 @@ class UPClient {
     // 如果不指定协议，默认使用http
     if (!this.config.host.startsWith('http')) {
       this.config.host = `http://${this.config.bucket}`;
+      out.info(`图床域名：${this.config.host}`);
     }
     this.imageBedInstance = new upyun.Client(new upyun.Service(this.config.bucket, secretId, secretKey));
   }
diff --git a/util/img2cdn.js b/util/img2cdn.js
index 32d778f..b929b5a 100644
--- a/util/img2cdn.js
+++ b/util/img2cdn.js
@@ -100,14 +100,17 @@ async function img2Cdn(article) {
     try {
       // 4。检查图床是否存在该文件
       let url = await imageBed.hasImage(fileName);
+      let exists = true;
       // 5。如果图床已经存在，直接替换；如果图床不存在，则先上传到图床，再将原本的语雀url进行替换
       if (!url) {
         url = await imageBed.uploadImg(imgBuffer, fileName);
+        exists = false;
       }
       return {
         originalUrl: matchYuqueImgUrl,
         yuqueRealImgUrl: yuqueImgUrl,
         url,
+        exists,
       };
     } catch (e) {
       out.error(`访问图床出错，请检查配置: ${e}`);
@@ -118,7 +121,11 @@ async function img2Cdn(article) {
   urlList.forEach(function(url) {
     if (url) {
       article.body = article.body.replace(url.originalUrl, `![](${url.url})`);
-      out.info(`replace ${url.yuqueRealImgUrl} to ${url.url}`);
+      if (url.exists) {
+        out.info(`图片已存在 skip: ${url.url}`);
+      } else {
+        out.info(`replace ${url.yuqueRealImgUrl} to ${url.url}`);
+      }
     }
   });
   return article;