Prognostics and health management(PHM) technology is the main method for improving the system availability,maintenance efficiency and reducing the life-cycle cost,which has become a key technology and one of the important goals of future aircraft avionics system design.From the perspective of the development of avionics system and PHM technology,the development status of PHM technology is summarized.The OSA-CBM open architecture of integrated avionics PHM system is introduced,and analysis is given to the key technologies of PHM system.Finally,discussion is presented to the future development of the integrated avionics PHM technology.