The utility model relates to a dual -purpose case roof beam of bridge piping lane, including roof, corbel back slab, web and bottom plate, still include pipeline, mid -board and pore, the pipeline is located on the bottom plate and web in the case roof beam, the mid -board interval sets up, divide into a plurality of cabins with the case roof beam, be equipped with the pore that corresponds with the pipeline on the mid -board. Adopt the utility model discloses a valley location utility tunnel engineering construction difficult problem can effectively be solved to the structure, saves engineering materials and time limit for a project, and economic benefits and social are showing.