Abstract: The modifying t reatment s of sisal for improving physical and chemical performance were investigated ,and the optimum modifying procedure was achieved. The modified sisals were used as reinforced fiber in f rictionmaterials. The wear properties were investigated by means of D-MS constant speed tester and the result s were com²pared with the raw sisal enhanced and mineral / steel fiber reinforced f riction materials. The result s show that thef riction factor is good for fitting with low fluctuations for different temperature values. The sisal is an ideal substi2tute for asbestos.