The purpose of this paper is to solve the problem that the naval gun can't detect the miss distance of the marine target in real time, to improve the methods of the naval gun's shooting observation and shooting correction for marine targets, and to enhance the ability of the naval gun in real combat.Firstly, based on aerial photogrammetry and the UAV's target positioning technology, the dual UAV model for simultaneous positioning of targets and burst points on the photovoltaic platform is deduced by constructing the model of the geometric relationship between the target, the burst point and the image point in the imaging space and by using the least squares method.Secondly, considering the latitude and longitude information of the naval ship, the miss distance between the burst point and the target is calculated by using the Gaussian average quotation inversion formula.Finally, the miss distance detection model is simulated by using Monte Carlo method and its error characteristics are analyzed.