In this study, the development of Shenzhen′s underground traffic planning and the requirements of relevant rules and regulations are systematically presented, the status and scale of the construction of various underground transportation facilities in Shenzhen are summarized, and the challenges faced by the development of underground transport in Shenzhen are analyzed in terms of idea orientation, planning system, policy system, smart construction, and evaluation mechanism. Based on analyses, in terms of the planning system and contents, special research on techniques for enhancing the development of underground transport facilities and the compilation and transmission of underground traffic planning combined with a territory spatial planning system shall be conducted. In terms of planning coordination and implementation, a comprehensive management department of underground space should be specifically established for underground public facilities, and its responsibility should be clarified, special rules and regulations of underground traffic facilities and underground traffic information management platforms should be established, and the implementation evaluation and feedback systems for underground traffic projects should be performed to optimize underground traffic planning iteratively and accumulate experiences for largescale and deepening underground development.