MBR (Membrane Bioreactor) for sewage treatment

The utility model relates to the technical field of sewage treatment, and discloses a sewage treatment MBR (Membrane Biological Reactor) which comprises a treatment box, a water inlet is arranged above the treatment box, a flow guide pipe is arranged at the bottom end of one side of the treatment box, a reaction box is arranged on one side of the flow guide pipe, and an access hole is arranged on one side of the reaction box. A first filter screen is arranged at the upper part in the treatment box, a second filter screen is arranged at the lower part in the treatment box, and a screw rod is arranged in the treatment box and is close to the position between the first filter screen and the second filter screen. According to the sewage treatment device, the first filter screen and the second filter screen are arranged in the treatment box, so that sewage can be doubly filtered through the first filter screen and the second filter screen, and substances with large volumes, such as fibers and impurities, in the se