Rubber timing belt, belt and pulley tooth groove mesh transfer movement and power, is a kind of meshing transmission, thus has the gear transmission, chain drive peace with all kinds of advantages. With accurate synchronous belt transmission gear ratio, no slip, constant speed ratio is available, and can be fine mi transmission, stable transmission, shock absorption, low noise, large range of transmission ratio, high transmission efficiency. Transfer of power from a few to several hundred thousand watts. Multi-axle transmission, compact structure and apply tension is small, without lubrication, no pollution, thus there is no pollution and can work in normal work environment is relatively bad situation.