At present, F-22 has been equipped in USAF, and F-35 is about to be equipped.The aviation powers, such as Russia, have been on pressing on with the development of the fifth generation fighter, treading on the heels of US.The research of the sixth generation fighter has begun in US for Air Dominance, and the “air superiority” contest around 2030 has started.Based on the USAF strategic conception,the article analyzes the development motivation, latest research progress,capability needs and associated technology characteristics of the sixth generation fighter of USAF.