The project is located in Longquan City, Lishui City, Zhejiang Province. It is an urban road bridge. The main bridge adopts a 120 meter and 80+60 meter double through arch bridge, and the approach bridge adopts a continuous bridge deck structure of 30 meter simply supported prefabricated steel box girder and 30 meter simply supported cast-in-place box girder. The main bridge length is about 448 meters, the width is 38 meters, the maximum span is 120 meters, the approach bridge length is about 90 meters, the width is 18 meters, and the total steel consumption is about 5000 tons.