The tensile strength and wear resistance of ADC12 aIloy matrix composites reinforced with saffil/cerakwooI and saffil/Si particle prepared by squeeze casting have been investigated in room temperature and 250℃. Adhesive and scuffing wear phenomena was studied when Ioad was changed to 10 ~ 40N and wear velocity was 2.0m/s at room temperature and 250℃. Generally, the morphology of tensile fractured surface revealed dimple pattern which implies ductile fracture of the composites. However, cleavage fracture was also observed in case of ADC12 aJloy based saffil/Si particle composite. The maximum tensile strength of 320MPa was obtained in ADC12 alloy based composites reinforced by saffil/cerakwooI(5: 5) preformed fibers. In the results of dry wear test, it was observed that scuffing was occured at 40N in room temperature and 30N for 250℃.