The penetration ability of the damage element formed by the combined charge cover in water is greatly strengthened,a kind of cone-ball-hole compound drug-shaped cover is designed,by changing the cone-ball cover material,the simulation scheme is determined for numerical simulation.The results of the cone-ball combination drug cover with different materials are aluminum-tungsten respectively,warhead penetration ability is strongest,when aluminum-aluminum,the aperture of the penetrating target plate is maximum.The maximum penetration depth is found in the case of tungsten-copper,and the maximum aperture is found in the case of aluminum-copper.