Ring synchronous belt is one of the synchronous belt which is integrated the merits of a belt drive, chain transmission gear drive the new belt transmission, which consists of a week is equipped with the spacing of the surface of the ring belt and with appropriate tooth belt wheel. It is the structure of the wire rope or glass fiber as powerful layer, outside with polyurethane or neoprene ring belt. Ring synchronous belt within weeks into dentate, let it can better mesh and cog belt wheels. Ring synchronous belt transmission ratio accurately, the axial force is small, compact structure, oil resistant, good abrasion resistance, good ageing resistance, temperature for the use of general 20 ℃, 80 ℃, and the ring synchronous belt for synchronous drive can also be used for low speed drive.