In order to obtain stable impact performance of cover of launch container for storage, the influence factors were analyzed. The influence of impact factors such as impact velocity, impact weight and fillet radius of warhead was investigated by orthogonal experiment, and the opening pattern of cover was introduced during impact process. Combined with the deviation analysis, the influence degree of different factors on the impact force of cover was compared. The results indicate that the impact velocity is the main factor affecting impact force of cover. The impact force is decreased with the increase of impact velocity and impact weight, and increased with the increase of fillet radius.