The sixth generation fighter is important equipment for USAF to re-establish its first-generation strategic advantage. We should fully recognize the leading position of USAF in the development of a series of related technologies and the important position of systematic warfare in future wars. It is important to increase the research on relevant concepts and supporting technologies. For this reason, the development trend of the sixth generation fighter of USA, Russia and European is analyzed to obtain the understanding of the equipment capacity of the sixth generation fighter from the technical perspective.