The invention discloses a bridge. The bridge comprises a main beam (1) and a pier for supporting the main beam (1), wherein the main beam (1) comprises a main beam web plate (3) arranged on the pier and main beam flange plates (2) extending from the upper end of the main beam web plate (3) to two sides; the beam part structure also comprises at least one auxiliary beam; and the at least one auxiliary beam is fixedly supported between the main beam flange plate (2) and the pier on at least one side of the main beam web plate (3). By arranging the auxiliary beam below the main beam flange plates of the main beam of the bridge, the bearing capacity of the bridge is increased, and higher transport requirement can be further met.