Agricultural machinery such as harvester HST drive, valley drive, often using reverse tension wheel, tight wheel clutch and other power transmission structure. And in recent years due to the high horsepower of the engine, making the general industrial belt can not be used for a long time agricultural machinery. With high efficiency, can easily clutch, low noise, leap to improve the high load, high transmission power, bending resistance, wear resistance of the specifications, horizontal steel better, more impact resistance. Applicable to tight wheeled clutch. Friction coefficient, good wear resistance, bending stress and centrifugal force loss is small, high transmission capacity, the belt can maintain a long life.