Sewage treatment biological reaction device

The utility model discloses a sewage treatment biological reaction device. The sewage treatment biological reaction device comprises a grille well, a regulation pool, a hydrolysis acidification pool, a contact oxidation pool, a membrane biological reaction pool and a clear water pool, wherein the hydrolysis acidification pool and the contact oxidation pool are positioned above the membrane biological reaction pool, and more than two membrane components are arranged in the membrane biological reaction pool. The sewage treatment biological reaction device disclosed by the utility model can optimize a sewage treatment process and is a sewage treatment biochemical reaction pool system with the advantages of few reactors, few steps, small floor area and high efficiency, an internal circulation denitrification technology is simultaneously utilized for performing nitrogen removal and phosphorus removal treatment on sewage, the membrane biological reaction pool adopts a membrane for filtering outlet water, and a prec