当前，新型城镇化和区域协调发展战略深入推进，涌现出具有强劲辐射带动能力的超大城市（群），对构建多层次轨道交通系统、更好服务城市（群）交通需求提出了迫切要求。本文结合国内超大城市（群）中具有代表性的广州枢纽、成都枢纽、北京枢纽等，精准梳理了我国多层次轨道交通的发展现状并研判了面临的主要问题。提出了提升多层次轨道交通服务城市功能的发展路径，包括推动多网共站实现多层次轨道交通“点”融合，重视轨道“进核”实现融合水平提升，推动廊道资源高效利用实现功能互补和技术经济最优，坚持公交化运营实现服务城市功能提升，增加线网供给实现国铁网和地铁网衔接融合；以北京市为例，给出了提升多层次轨道交通服务城市功能的规划方案。建议从完善枢纽联通性、优化生产设施布局、发挥“点”融合作用、注重既有廊道资源利用、深入推进公交化开行等方面创新发展理念并加强实践探索，为进一步提高轨道交通对城市发展服务保障能力积累经验。

Currently, with the in-depth promotion of new urbanization and regional coordinated development strategies, megacities (clusters) with strong driving capabilities have emerged in China, posing urgent demands for building a multi-level rail transit system to better serve the transportation needs of cities (clusters). By taking into account representative megacities (clusters) such as Guangzhou, Chengdu, and Beijing hubs, this study summarizes the current status of multi-level rail transit in China and proposes main problems it faces. Development paths for enhancing the urban service function of multi-level rail transit are proposed, including promoting multi-network shared stations, emphasizing the integration of railways into core urban areas, encouraging the efficient utilization of corridor resources to achieve complementary functions and optimal economic outcomes, adhering to public transportation-oriented operation, and increasing railway network supply to achieve the connection and integration of national railway and subway networks. Taking Beijing as an example, a planning scheme is presented to enhance the urban service function of multi-level rail transit. On this basis, it is suggested to innovate development concepts from the aspects of improving hub connectivity, optimizing the layout of production facilities, leveraging the integration effect of transportation stations, focusing on the utilization of existing corridor resources, and further promoting public transportation-oriented operations. It is also necessary to strengthen practical exploration to accumulate experiences for further improving the service and support capabilities of rail transit for urban development.