Abstract: To solve the problem of limited parking conditions in subway parking lots, ensure the efficiency of peak-hour departures, and guarantee that the parking, maintenance and other operations within the depot are not affected, a special analysis was conducted on the foundation design, main structure force, ramp design of the second floor parking and inspection depot on the ground, and the stress under the conditions of floor temperature rise and fall of the first metro double-deck parking lot in Guangzhou. The results show that the Guangzhou Xincheng parking lot adopted the inverted layout scheme of the double-deck parking and inspection depot. Under the premise of meeting the operational needs and convenience of the metro, the plan optimized the layout by considering the surrounding control factors of the parking lot, solving the problem of limited land use. At the same time, the ground metro double-deck parking lot solved the problem of the connection between the parking and inspection lines and the entry and exit lines, reserved the conditions for fully automatic driving and the development of the upper cover, and met the metro's peak-hour vehicle receiving and dispatching capacity, providing a departure frequency of one train every four minutes for the operation department. In order to efficiently and intensively utilize land, for plots with similar surrounding restrictions, if a section site layout plan design is needed, priority can be given to using a double decker parking lot design.