The aeroheating of hypersonic vehicle with air-breathing engine is serious when cruising with high speed.It is a key problem how to predict the aerodynamic heating and decrease the body surface temperature.This paper uses three-dimension N-S equation,MacCormack central differential scheme to study the aeroheating of the hypersonic vehicle.The influence of different Mach number on the aeroheating is analyzed.The results indicate that the numerical simulation proposed in the paper can accurately predict the aerodynamic heating of the hypersonic vehicle and can be provided a consultation for heating prevention system design.