Sonic boom is caused by the supersonic flight,which could cause damages of various degrees to aircraft structures or residents under air lines.The accurate simulation of sonic boom is of great importance for the evaluation of its influences on aircraft structures.It is hard to do the direct full-field simulation of sonic boom at cruising altitude of supersonic aircraft due to the limitation of computing capacity.Current sonic boom prediction methods usually have two steps.Firstly,the near field over-pressure is achieved by supersonic linearized theory or computational fluid dynamics.Then the near field signal is advanced to far field by acoustic methods to get the ground pressure signature of the aircraft.