Zhoushan Archipelago sea area has the complicated characteristics,such as many traffic crossings and navigable ship types,route crossing,complex tide flow and navigation condition.The method for planning bridge channel and determining navigation clearance scale is unique in this sea area.Taking Yushan Bridge as an example,we fully analyze the ship navigation data,and combine tidal current data by mathematics model of bridge construction and reclamation project.Through multi scheme comparison and route optimization,we apply ship simulation test,determine the navigable grade of bridge and the channel for bridge area,obtain and reasonable navigation clearance scale and layout of navigation hole.We provide important technical support for the design of bridges.