In order to solve the radar station location problem of ship traffic management system, by considering the factors of single radar failure and radar coverage demand, and taking the minimum total cost of station construction and the maximum total area coverage of water area as the goal, a two-objective model was constructed, and an adaptive weighted multi-objective particle swarm optimization algorithm was designed to solve it. The example verification results show that the model can optimize the location of VTS radar station under the constraints of coverage times and area coverage, which improve the scienticity and rationality of location, and provide decision-making reference for maritime authorities.