Effects of SiC particle oxidation on the wettability and interfacial bonding of SiCp/Al composites fabricated by stirring casting were analyzed based on oxidizing SiC particle at different temperatures.The results show that SiO2 oxidized layer is formed on the surface of SiC particle by oxidation treatment and reacted with the molten Al at high temperature,which improves the wettability of SiC particle with the molten Al by reducing the interface bonding energy and enhances the interfacial bonding strength.Particle with desirable bonding interface is uniformly distributed in the prepared composites.MgAl2O4,Mg2Si phase can be observed in the interface with the Al4C3 phase free.The fracture mechanism of the composites is characterized by particle crack and pull-out of particle from the matrix.