Based on the research of the intersection of shot plane,this paper analyzes the important factor which affects the safety of the contemporary shot of many weapons and the reasons of the intersection of shot plane.The model of judging the intersection of shot plane is established,and the methods of weapon control are studied,and the model of forbidding the production of shooting signal is built.The results are of great importance as a guide to the general design of the surface ship,and weapon control and combat.