Al₂O₃•SiO_2sf/Al－Cu composites with different Cu contents were successfully fabricated by squeeze casting. The wear test results show that friction coefficient of the composites decreases with increasing Cu contents. Moreover, the wear resisting property of the prepared composites firstly increases and then decreases with increasing Cu contents. In wear testing process, Al₂O₃•SiO₂ fibers are firmly fixed in the matrix and formed the framework which can protect Al matrix from grinding. Therefore, the wear resistance of the composites is increased by addition of Al₂O₃•SiO₂ fiber reinforcement. The main wear mechanism of Al₂O₃•SiO_2sf/pure Al composite is adherence abrasion, while that of Al₂O₃•SiO_2sf/Al－Cu composite is adhesive wear accompanied by abrasive wear.