Pit parking can be divided into two-layer or multi-layer. Pit parking can save the use area of the parking space and make the parking space more compact .Pit park upwards and downwards together. While one car is parked on the available platform the other car is on the lower-level platform. To take out the lower level car, the system takes up both the platform together and lower lever reaches ground level. Pit parking is suitable for popularization in large public parking lots. Pit parking makes full use of the ground and underground space to increase the number of parking. The number of rows can be reasonably arranged according to user requirements.