Abstract: A reactive dual-mode warhead capable of switching between shaped charge jet (JET) and rod-shaped charge jet (JPC) by changing the detonation mode was designed. The forming process of the two modes of penetrators was analyzed by Autodyn simulation software, and the damage effects of the two penetrators on the steel target were compared through quantitative analysis of the penetration process and the detonation-like reaction process. The results show that when the standoff is 2 times the diameter of the charge, the JET penetrator produces a deeper penetration hole, while the JPC penetrator produces a larger diameter penetration hole. The influence of the structural parameters of the liner and the standoff on the damage effect of the reactive composite dual-mode warhead was studied. The influence of the liner thickness, cone angle and standoff on the penetration depth, the average diameter of the penetration hole and the reaction position of the reactive material in the penetration hole was obtained.