In recent years, the underground garage link frequently appears in the planning and design of high-intensity development area to solve the traffic problem which is becoming more and more prominent with the continuous growth of motor vehicle. The underground ring road project at the starting area of Mingzhu Bay (Hengli Island) in Nansha New District of Guangzhou is an important project to serve the traffic in the core area of the Hengli Island, expand the capacity of the regional road network, reduce the pressure of ground traffic and improve the quality of the ground environment. By considering the current situation and planning conditions, functional positioning, traffic organization and other factors, the construction standard of the project, entrance and exit scheme, and the overall scheme are comprehensively analyzed and evaluated. And a reasonable design scheme is put forward, which provides the reference for road traffic design of the relative underground space.