In this paper, the laser irradiation indication and tracking detection of laser guided munitions for naval guns under typical conditions are simulated and verified in order to improve the combat efficiency of naval gun weapon system. Firstly, aiming at the use scenarios of laser precision guided munitions in naval gun weapon systems, a laser irradiation indication and ammunition detection and tracking model is established. Then, a laser guidance light zone simulation calculation software is compiled, and the synergy method, indication and detection capabilities between laser precision guided munitions and irradiators under different meteorological visibility conditions, different attack targets, ship's own irradiation indication, UAV on-board irradiation indication and other conditions are studied, and simulation calculations are carried out finally. The results show that the energy density of the reflected laser gradually decreases with the increase of angle θc, and the larger the laser incidence angle θz, the greater the energy density of the reflected laser. The laser light guidance zone produced by the two irradiation methods is relatively similar. UAV laser guidance methods and ship laser guidance methods have their own advantages and disadvantages, and can be applied to different scenarios.