Submarines can shoot magnetic decoys to resist airborne magnetic detection. Aiming at the evaluation of magnetic decoy’s antagonism effectiveness，firstly，the application characteristics of the magnetic field curve similarity measurement method based on discrete Fréchet distance are analyzed. Combined with the motion trajectory characteristics of the anti-submarine aircraft when it encounters decoys，a decoy’s magnetic field antagonism effectiveness evaluation method based on detection probability is proposed，the confrontation probability description under typical demand scenarios is given，and the simulation application and analysis are carried out. This method can evaluate the capability of the decoy against airborne magnetic detection，and can be used to evaluate decoys and assist in optimizing decoy use strategy.
