Air suspension is a suspension system that replaces traditional coil springs with air springs. Compressed air is injected into the airbag through an air pump to achieve automatic adjustment of vehicle height and adaptive damping. Compared with traditional coil spring suspension, the core advantage of air suspension is that the body height can be automatically adjusted according to the vehicle speed and road conditions (reducing wind resistance at high speeds and increasing off-road ride comfort by raising the chassis), shock absorption and damping can be adjusted in real time according to the driving mode, and the natural frequency of air spring does not change with the load. The ride comfort is basically the same when fully loaded and unloaded.