diff --git a/quark_client/cli/commands/basic_fileops.py b/quark_client/cli/commands/basic_fileops.py
index 287064a..bfaf4de 100644
--- a/quark_client/cli/commands/basic_fileops.py
+++ b/quark_client/cli/commands/basic_fileops.py
@@ -385,9 +385,9 @@ def upload_file(file_path: str, parent_folder_id: str = "0", folder_path: Option
                 def progress_callback(percent: int, message: str):
                     progress.update(task, completed=percent, description=message)
 
-                # 开始上传
+                # 开始上传（使用绝对路径）
                 result = client.upload_file(
-                    file_path=str(file_path),
+                    file_path=str(file_path_obj.resolve()),
                     parent_folder_id=parent_folder_id,
                     progress_callback=progress_callback
                 )
diff --git a/quark_client/config.py b/quark_client/config.py
index 844f672..48df88e 100644
--- a/quark_client/config.py
+++ b/quark_client/config.py
@@ -14,8 +14,8 @@ def get_config_dir() -> Path:
     if config_dir:
         return Path(config_dir)
 
-    # 默认使用当前目录下的config文件夹
-    return Path.cwd() / 'config'
+    # 默认使用用户主目录下的 .quarkpan 文件夹（不受 cd 影响）
+    return Path.home() / '.quarkpan'
 
 
 def get_default_headers() -> Dict[str, str]:
diff --git a/quark_client/services/file_upload_service.py b/quark_client/services/file_upload_service.py
index d30653c..eda66cf 100644
--- a/quark_client/services/file_upload_service.py
+++ b/quark_client/services/file_upload_service.py
@@ -93,7 +93,22 @@ def upload_file(
         if progress_callback:
             progress_callback(20, "更新文件哈希...")
 
-        self._update_file_hash(task_id, md5_hash, sha1_hash)
+        hash_result = self._update_file_hash(task_id, md5_hash, sha1_hash)
+
+        # 检查是否秒传成功（文件已存在于服务器）
+        if hash_result.get('finish'):
+            if progress_callback:
+                progress_callback(100, "秒传成功")
+            return {
+                'status': 'success',
+                'task_id': task_id,
+                'file_name': file_name,
+                'file_size': file_size,
+                'md5': md5_hash,
+                'sha1': sha1_hash,
+                'upload_result': {'strategy': 'instant_upload', 'message': '秒传成功，文件已存在'},
+                'finish_result': hash_result
+            }
 
         # 步骤3: 根据文件大小选择上传策略
         if file_size < 5 * 1024 * 1024:  # < 5MB 单分片上传