In order to verify the application value of the Beidou satellite positioning system in water transportation engineering，and discuss the application prospect and development direction in the future，based on the application research status of Beidou satellite positioning system in the engineering field，we carry out a preliminary exploration on the application of Beidou satellite positioning system in water transportation engineering，including safety supervision of port personnel，safety supervision of vehicles，drivers and passengers in the port area. The characteristics of the application platform and method are summarized，and the improvement and development direction of the Beidou system in the future are prospected. The application shows that the Beidou positioning system has the advantages of safety and reliability，large coverage，and accuracy comparable to GPS，but there is still room for improvement in the application field，such as improving the positioning instability when the equipment is blocked，solving the cost problem of the equipment using short message communication in the open sea，and further expanding and improving the application scenarios.