Deep hole machining is widespread in aerospace manufacturing industry and it is one of the most difficult processes. Complex shell parts are the key parts of an aeroengine. The quality of the deep holes in shell parts has an immediate im-pact on the service performance and life of an aeroengine. According to the technological characteristics and difficulties of the deep hole machining for complex shell part

the existing method and key technologies of deep hole machining in-cluding mechanical behavior

chip morphology and evacuation method

monitoring and equipment for deep hole machining are summarized. At last

the research development of this field in the future is discussed.