Skid Steer Loader is also called multi-functional engineering vehicle, multi-functional engineering machine. It is a kind of wheel-type special chassis equipment that realizes the vehicle steering by using the linear speed difference between the two sides of the wheels. It adopts wheel-tyre walking mechanism, all-wheel drive, skid steering, and can be quickly replaced or attached to various working devices at the job site to adapt to different working environments and work contents. The power of the loader is generally 20~50 kW, the weight of the main engine is 2000~4000 kg, and the speed is 10~15 km per hour. It is mainly used for the occasions where the operation site is narrow, the ground is uneven, and the operation content changes frequently.