Different from traditional naval gun,high-energy laser weapon illuminates the target surface at a point for several seconds to make target damage. In fact,it’s a process of energy accumulation. To destroy aerial target,the process of laser pointing was analyzed,including calculation of elevation angle,azimuth angle of laser beam and killing time in ideal situation. Considering heave movement of navy vessel and the distance between sensor and laser weapon,laser pointing model was established in stable coordinate system of navy vessel,by adopting method of coordinate transform and coordinate conversion under the influence of swaying navy vessel. On the basis of laser pointing model,energy of the laser,threshold damage energy,killing time and average facula area were calculated,and damage assessment simulation model was established. Error precisions in the process of laser pointing were analyzed according to simulation results.