Because of its excellent performance, hypersonic vehicle has become the commanding point of military strategy and technology of military powers. C/C composites with high strength, light weight and good seismic performance have attracted wide attention. C/C composites not only have good electrical conductivity, thermal conductivity and light weight characteristics, but also have good friction resistance, high temperature resistance, thermal shock resistance and corrosion resistance, especially because of their excellent high temperature mechanical properties, so they become one of the ideal materials for hypersonic aircraft. However, due to the complex service environment of hypersonic vehicle (high temperature, water and oxygen environment), oxidation and ablation of C/C composites under high temperature and aerobic conditions have become the bottleneck of its wide application. The preparation of ZrB2/SiC coatings on C/C composites by atmospheric plasma spraying (APS ) is one of the effective methods to improve the anti-oxidation ablation performance and prolong the service life of C/C composites. However, the coatings still have some shortcomings such as difficult densification, low emissivity and fast heating rate, so they cannot be widely used.