Aiming at the operational application of outboard active bait on rainy daysthe influence of rainfall attenuation on radar detection performance is analyzedand the maximum radar operating range model under rainfall attenuation is established to obtain the relationship between the maximum radar operating range and rainfall rate.By analyzing the centroid jamming mechanism of outboard active bait and based on the factors influencing the jamming effect of outboard active bait in sunny weathera series of mathematical models under rain attenuation are establishedsuch as the equivalent Radar Cross-Section (RCS) model of outboard active bait and the missile tracking model.The shortest deployment distance of outboard active bait for effective jamming under different rainfall rate conditions is simulated and calculatedwhich provides a reference for the tactical application of outboard active bait.