diff --git a/backend/main.py b/backend/main.py
index 20d3ae73..96c92dd5 100644
--- a/backend/main.py
+++ b/backend/main.py
@@ -1490,6 +1490,48 @@ class AppServer:
                 self.logger.error(f'上传报告失败: {e}')
                 return jsonify({'success': False, 'error': str(e)}), 500
 
+        @self.app.route('/api/reports/<session_id>/delete', methods=['POST'])
+        def delete_report_pdf(session_id):
+            """删除会话的PDF报告"""
+            try:
+                if not self.db_manager:
+                    return jsonify({'success': False, 'error': '数据库管理器未初始化'}), 500
+                
+                # 获取会话信息
+                session_data = self.db_manager.get_session_data(session_id)
+                if not session_data:
+                    return jsonify({'success': False, 'error': '检测会话不存在'}), 404
+                
+                report_path = session_data.get('detection_report')
+                if not report_path:
+                    return jsonify({'success': True, 'message': '报告不存在'}), 200
+                
+                # 获取文件存储根目录
+                base_dir_cfg = self.config_manager.get_config_value('FILEPATH', 'path', fallback=None) if self.config_manager else None
+                if not base_dir_cfg:
+                    return jsonify({'success': False, 'error': '未配置文件存储路径'}), 500
+                
+                base_dir = os.path.abspath(base_dir_cfg)
+                full_path = os.path.join(base_dir, report_path)
+                
+                # 删除文件
+                if os.path.exists(full_path):
+                    try:
+                        os.remove(full_path)
+                        self.logger.info(f'已删除报告文件: {full_path}')
+                    except Exception as e:
+                        self.logger.error(f'删除文件失败: {e}')
+                        return jsonify({'success': False, 'error': f'删除文件失败: {str(e)}'}), 500
+                
+                # 更新数据库
+                self.db_manager.update_session_report_path(session_id, None)
+                
+                return jsonify({'success': True, 'message': '报告已删除'})
+                
+            except Exception as e:
+                self.logger.error(f'删除报告失败: {e}')
+                return jsonify({'success': False, 'error': str(e)}), 500
+
         
         
         @self.app.route('/api/detection/<session_id>/save-data', methods=['POST'])