The overall planning and process design of parking lot have an important impact on the use of passengers and the management of the parking lot. Reasonable planning of parking partition, process design and sign guidance can not only decrease the detour distance of driver, but also effectively reduce the management difficulty of large parking lots. Based on the reconstruction of the parking lot in front of Xi'an Xianyang International Airport Terminal, the reconstruction idea of the outdoor parking lots is briefly analyzed, and the partition design, process design and sign guidance of parking lots are discussed in detail in order to provide a certain reference for the same type of the reconstruction of parking lots and the new construction projects.