This paper describes the current situation of metal parts repair in aircraft overhaul, points out the defects that the repair technology of machining reducing materials can not meet the repair requirements, and puts forward the advantages and necessity of adding materials manufacturing repair technology in the repair of metal fault parts. At the same time, aiming at the three kinds of common faults of shape and size, material strength and surface coating, we analyzed the repair application process, repair and remanufacturing evaluation, repair process selection and repair quality evaluation requirements. The typical application range of advanced additive manufacturing repair technologies such as laser cladding, thermal spraying, and cold spraying in aircraft overhaul was pointed out. In view of the problems existing in the application, such as lack of standards and means accreditation and certification, some suggestions for improvement are put forward.