Abstract: The research and development of X-37B has attracted high attention in recent years.It is significant to investigate the trans-atmospheric vehicle from the aspect of aerodynamic technology.In this paper,the development history of X-37B is introduced.Its strategic utility is discussed,and some key aerodynamic technologies are reviewed,including the optimization de-sign of the aerodynamic configuration,the compound control system design of the aero-surfaces/RCS/OMS,the thermal protection technology,aero-assisted orbital transfer.The progress based on the three major methods of aerodynamics research is also reviewed.Finally,experience and lessons from X-37B are summarized briefly.