Abstract: In recent years, difficult-to-machine materials such as titanium alloys, high-temperature alloys and high-strength steels have been widely used in the aerospace industry. Due to the high strength, high hardness, high toughness and high wear resistance of such difficult-to-machine materials, problems such as severe tool wear, low workpiece quality, and high production cost are encountered in the conventional processing process. The application of low temperature cutting technology reduces tool wear, extends tool life, improves surface finish quality of parts, and ensures part machining accuracy. At the same time, the technology saves the cost of cutting fluid and waste liquid processing, reduces processing costs, and improves processing efficiency. Therefore, low temperature cutting technology has become one of the main technologies for processing difficult materials. This paper describes the development of cryogenic cutting technology and its application in the processing of difficult-to-machine materials. It points out the problems of low-temperature cutting technology and provides guidance for the development of low-temperature cutting technology and the processing of difficult-to-machine materials.