In order to optimize the structure design of shaped charge warhead, the influence of cone Angle of shaped charge cap on shaped charge armor breaking was studied. The finite element model of shaped charge warhead was constructed by taking the diameter, height, blasting height and thickness of target plate as the main parameters, combined with the relevant state equations of explosives and shaped cover materials. The forming process of shaped charge jet was analyzed by ANSYS/LS_DANA finite element program, and the relationship between the cone Angle of shaped cover and favorable blasting height was simulated. The simulation results show that compared with the experimental results, the simulation results have good accuracy, which can provide some reference for the design of shaped charge warhead.