The invention discloses a pneumatic accessory for a vehicle and the vehicle having same. The pneumatic accessory for the vehicle comprises an air dam, an engine bottom protecting plate and an air flowpassage. The gas dam comprises an air inlet. The engine bottom protecting plate is provided with vents. The inlet end of the air flow passage is communicated with the air inlet, and the outlet end ofthe air flow passage is opened. The air flow passage is communicated with the vents. According to the pneumatic accessory for the vehicle, the air resistance experienced during running of the vehicleis significantly reduced, the grip performances of wheels are ensured, the maneuverability of the vehicle is improved and the fuel consumption is reduced, the engine and the brake of the vehicle arecooled, the service lives of the engine and the brake of the vehicle are prolonged, the overall structural strength of the pneumatic accessory for the vehicle is improved, the installation steps are simplified and the installation time is saved.