The ship-bridge collision-prevention design of Donghai bridge is taken as an example to discuss the design of ship-bridge collision-prevention for the bridge located in complicated environment and several schemes with feasibilities are compared. Large-diameter thin shell cylindrical structures widely used in the port engineering are introduced to construct a new type of anti-collision system, with detailed structures presented. It can be a reasonable selection for the ship-bridge collision avoidance system due to the favorable mechanical properties and adaptability of foundations of large-diameter thin shell cylindrical structures. The detailed structures of shipbridge collision avoidance system presented in this paper may provide some reference for the design of ship-bridge collision avoidance system of bridges under similar environment.