In order to enlarge the damage area and improve the penetration ability of EFP/prefabricate fragment warhead, different structures are designed. There are 4 schemes of baffle ring structures and prefabricated fragment arrangement modes. The formation processes are simulated by ANSYS/LS-DYNA to study the influences of baffle ring structures and prefabricated fragment arrangement modes on the kill element forming process and the damage effectiveness. Result shows that, when the top of the baffle ring and the bottom of the liner are in the same plane, the warhead can form EFP with a higher velocity, larger diameter ratio, and longer length and the tungsten spheres in inner ring with a higher axial velocity. The warhead with 26 tungsten spheres in inner ring and 32 tungsten spheres in outer ring can form tungsten spheres with a greater divergence angle, and can obtain a fragment field with good penetration performance and uniform fragment density. The simulated results are in good consistent with the experiments.