According to the data analysis of the U. S. Australia cooperation NULKA suspension decoy missile, it is necessary to develop a new type of jamming missile; the local indexes of suspension height, velocity and time have exceeded NULKA. In order to solve the impact and ablation of the tail flame of the jamming missile on the ship and ensure the reliability of the rocket launching, the eddy current diversion device was designed. The key technology involved in this paper is to determine the diversion clearance and the special structure according to the calculation of missile gas flow field. The field test proves that the design of the diversion method is reasonable and can meet the requirements of ships. It can be installed on the outer surface of ships to form new fire points.