The repair technology of metal parts is the core technology of aviation maintenance,and its development is related to the improvement of China’s aviation maintenance level and ability. For the repair technologies of metal parts involved in the aviation field,including welding repair,such as tungsten inert gas arc welding,plasma arc welding,friction stir welding,and additive manufacturing repair methods,such as laser direct metal deposition,electron beam fuse deposition,cold spraying,their technological characteristics and advantages are analyzed,and the current situation of technology research and engineering application is summarized. On this basis,the gap between domestic and overseas research and application of aviation repair technology is pointed out,and the future development trend,research direction and key points of this field are studied and judged.