Beibu Gulf of Guangxi is an important water area for the development of marine transportation and port logistics industry.Based on the data of ship automatic identification system(AIS)in 2020,this paper plots the customary shipping routes of the Beibu Gulf waters.With the help of mathematical statistics,it analyzes the ship traffic flow and traffic density of 21 ship traffic flow gateways on the customary shipping routes of the Beibu Gulf waters in Guangxi and puts forward the route planning suggestions.Meanwhile,it calculates the passage capacity of the shipping routes and puts forward reasonable suggestions.The results show that the shipping routes in Beibu Gulf generally present a basic pattern of “five trunks and sixteen branches”,and the number of ships in the ship intersection area is large and the traffic flow is complex,so it is necessary to strengthen the research and management of navigation risks in key and special waters.The navigation capacity of Guangxi Beibu Gulf can meet the current requirements of ship navigation in waters and the port throughput planning in 2035.The research results can provide decision-making support for shipping routes planning,sea area use management,and marine ecological environment protection in the Beibu Gulf of Guangxi.