diff --git a/cosclient.cpp b/cosclient.cpp
index 4488f3f..aa3df4d 100644
--- a/cosclient.cpp
+++ b/cosclient.cpp
@@ -144,6 +144,21 @@ bool COSClient::save2Local(const QString &path, const QString &localpath, const
     return true;
 }
 
+QMap<QString,QString> COSClient::headObject(const QString &path, const QString &localpath, const QString &versionId)
+{
+    preRequest request;
+    if(!versionId.isEmpty())
+    {
+        request.customHeaders.insert("versionId", versionId);
+    }
+    request.customHeaders.insert("If-Modified-Since", "");
+    request.customHeaders.insert("If-Unmodified-Since", "");
+    request.customHeaders.insert("If-Match", "");
+    request.customHeaders.insert("If-None-Match", "");
+    preResponse response = invokeHeadRequest(path, request);
+    return response.getMetaDatas();
+}
+
 QString COSClient::multiUpload(const QString &path, const QString &localpath, QMap<QString, QString> metaDatas)
 {
     //判断文件存在且可读
diff --git a/cosclient.h b/cosclient.h
index 8481092..c13c2ff 100644
--- a/cosclient.h
+++ b/cosclient.h
@@ -19,13 +19,13 @@ struct preResponse{
     QByteArray data;
     QMap<QString,QString> headers;
     QMap<QString,QString> getMetaDatas(){
-      //  x-cos-meta-*
-    QMap<QString,QString> metaDatas;
-    for(auto it=headers.begin();it!=headers.end();it++){
-        if(it.key().startsWith("x-cos-meta-")){
-            metaDatas[it.key().mid(11)]=it.value();
+        //  x-cos-meta-*
+        QMap<QString,QString> metaDatas;
+        for(auto it=headers.begin();it!=headers.end();it++){
+            if(it.key().startsWith("x-cos-meta-")){
+                metaDatas[it.key().mid(11)]=it.value();
+            }
         }
-    }
         return metaDatas;
     };
     int statusCode;
@@ -64,6 +64,7 @@ class COSClient : public QObject
     QString completeMultipartUpload(QString path, QString uploadId, QMap<int, QString> partEtagMap);
     QByteArray getObject(const QString &path,const QString &versionId, QMap<QString,QString> &respHeaders);
     bool save2Local(const QString &path, const QString &localpath,const QString &versionId, QMap<QString,QString> &respMetaDatas);
+    QMap<QString,QString> headObject(const QString &path, const QString &localpath, const QString &versionId);
     QString multiUpload(const QString &path, const QString &localpath, QMap<QString,QString> metaDatas=QMap<QString,QString>());
 
 private: