Airborne IR decoy plays an important role in modern air war. Anti-jamming technologies of air-to-air IR guided missile are introduced. The development and equipment of new foreign airborne IR decoy technology are discussed. The importance of airborne IR decoy in modern air war is indicated. According to the anti-jamming technology of IR guided missile, the design principle of airborne IR decoy is introduced. And the development of IR decoy technology in future is forecasted.