Abstract: Silicon carbide particulate reinforced composites with ZA22 alloy matrix were fabricated by semisolid metal mixing method.The structure and property of SiCP/ZA22 were studied by compar son with ZA22 alloy.The results showed that most particles distributed on the grain boundary,some of them reacted with martrix alloy and the reaction lay acted as nucleating base of α primary phase,fined the grain structure.The mechanical properties mainly depended on particles distribution and interface strength.The elastic constant of the composite were found higher than that of ZA22 alloy,but the ductility were lower.The composites also have high stability under high temperature.