中文摘要：

水下测试树是深水测试过程中风险控制的关键性设备，在特殊海况时具有快速断开测试管柱、封堵井下管柱内高压油气以达到保护测试仪器和人员安全以及避免海洋环境污染的作用。通过大量文献资料收集和现场调研，分析了水下测试树的国内外研究现状，详细介绍了国外水下测试树的功能、结构特点、应用情况及国内水下测试树的发展与应用情况。对比分析表明：国外水下测试树现有产品功能强大、性能可靠、适用于不同海洋工况，且不同公司的产品在结构和功能上各具特点。同时，针对国内水下测试树的应用现状，提出了水下测试树国产化的研究思路以及研究开发过程中可能出现的问题，对促进我国海洋石油水下装备自主研发与制造具有重要意义。

英文摘要：

The subsea test tree is a key risk control equipment in deep water testing process. Under the emergency condition, it is quick to disconnect test column, plug the downhole string within the high-pressure oil and gas in order to achieve the protection of test equipment and personnel safety and to avoid pollution of the marine environment in special sea conditions. Through extensive literature data collection and on-site research, we analyze the subsea test tree research status at home and abroad, detailing the functions, structural features of foreign subsea test tree, applications, and domestic subsea test tree development and application at home. The comparative analysis shows that： the foreign subsea test tree is the powerful, reliable for different conditions, and products by different companies we discuss have their own characteristics in structure and function. At the same time, with reference to the research and development process of the application status of domestic subsea test tree, problems that may arise in subsea test tree in China, and we explore the feasibility of subsea test tree production in China, too. We believe that this paper is of significance to research and development and manufacturing of China＇s offshore oil subsea equipment.