Directional warhead is an important measure for improving the target damaging capability of air to air missiles.Analysis is made to the capability of eccentric initiation warhead deformable warhead and aimable warhead and the application of the three kinds of warheads on air-to-air missiles is studied from overall design viewpoint.The result shows that the eccentric initiation warhead and deformable warhead have high feasibility to be used on air-to-air missile from the aspects of overall design performance and flexibility.