Aiming at the antinomy between collaborative decision-making theory and the need of the military accuses system, studies the research situation of foreign C2 collaborative decision-making theory and naval warship formation’s air defense. It also makes a comparative research on the effect of collaborative air defense caused by warship formation collaborative structure. On the basis of the research, a weapon-target assignment collaborative decision-making pattern under warship formation distributed collaborative structure is put forward. The simulation results show that, it is important to considering the quantity of air attack target and communication quantity before selecting warship formation structure.