A new jamming decision is proposed to improve the jamming effect of outboard active+smoke jamming on radar+infrared composite guided anti-ship missiles.Outboard active+smoke jamming is an effective means of countering radar+infrared composite guided anti-ship missiles.The deployment decision of the outboard active jammer and the coordinated decision-making of the smoke screen play a vital role in the jamming effect.By analyzing the guidance principle of radar+infrared composite guided anti-ship missiles,and using simulation modeling methods,a precise coordinated deployment decision of outboard active jamming and smoke screen jamming is proposed,which can improve the success rate of jamming in actual use.