Biological treatment device for sewage in flowing water

The utility model relates to the technical field of sewage treatment, in particular to a biological treatment device for sewage in flowing water, which comprises a plurality of hollow grid pipes, the hollow grid pipes are connected into a whole, and microbial carrier materials are arranged in the hollow grid pipes and/or among the hollow grid pipes. Blocking pieces are arranged on at least two opposite end faces of the integrated structure formed by connecting the hollow grid pipes, and the blocking pieces enable microbial carrier materials in the hollow grid pipes or between the hollow grid pipes not to flow out of the integrated structure formed by connecting the hollow grid pipes. According to the biological treatment device for the sewage in the flowing water, the microbial carrier material is placed in the hollow grid pipe, so that the treatment space is fully utilized, the specific surface area of biological treatment is multiplied, and the specific surface area is increased by at least two times compar