Missile electromagnetic catapult technology is the important application of electromagnetic launch technology in the field of missile and a great breakthrough compared with tradition catapult technology. Inducing main components and technological advantages of missile electromagnetic catapult system. Sketching technical characteristics of three missile electromagnetic launcher including coil launch, DC motor and rail launch. Introducing current development situation of missile electromagnetic catapult technology in home and abroad. Carding key technologies which restrict practicability of missile electromagnetic catapult technology. Expecting prospects for development of missile electromagnetic catapult technology.