Tractor is a small tractor. Called garden tractors in Europe and America. By the engine, chassis, electrical system is mainly used for haulage and transport multi-purpose mobile. Walking tractors are powered by internal combustion engines drivingsystem, get the driving torque of the driving wheel by tread tire surface to the ground and small, rearward horizontal force (tangent), the driving force of the reaction is to push the tractor forward (also known as propulsion). Simple structure, lesspower, suitable for small pieces of land. Controlled by the driver to hold the handle of control body, traction or driver supporting tools for the job.