The synchronous belt is made of steel wire rope or glass fiber as a strong layer, covered with polyurethane or neoprene rubber ring belt, the inner circumference of the belt is made of teeth, so that it engages with the tooth shaped belt wheel. When the synchronous belt drives, the transmission ratio is accurate, the force on the shaft is small, the structure is compact, the oil resistance, the wear resistance is good, the aging resistance is good, the general use temperature is -20℃ -80 ℃, v<50m/s, P<300kw, i<10, for the transmission requiring synchronization can also be used for low speed transmission. Material of synchronization belt: 1, rubber synchronous belt material/material: high quality synthetic neoprene rubber + skeleton material for imported high quality glass fiber cord + with teeth surface nylon 66 high tensile cloth + with a variety of different uses of accessories; 2, polyurethane synchronous belt material/material: polyurethane belt back + steel wire rope (or polyester wire rope) tensile layer + polyurethane belt teeth