Abstract: Silicon carbide (SiC) has the advantages of high strength, high thermal conductivity, high conductivity, and high hardness. It is an efficient reinforcing material in composite materials and is widely used in fields such as electronic packaging, mechanical manufacturing, and aerospace. And SiC used as reinforcement for composite materials is usually micro and nano sized powder, with high surface energy and a serious tendency to agglomerate. And there are also certain interface bonding problems during the preparation process of composite materials, which greatly limits the performance of SiC reinforced composite materials. Based on the preparation methods of SiC reinforced composite materials and the influencing factors of composite material reinforcement material and matrix composite, this article elaborates on the research progress of SiC pre-treatment process for composite material reinforcement materials from two aspects: purification and surface modification. Common pre-treatment processes in various aspects are introduced and exemplified one by one, and several urgent problems in the SiC pre-treatment process for composite material reinforcement materials are proposed.