Centralized excrement treatment device for breeding farm

The invention relates to a centralized excrement treatment device for a breeding farm. The centralized excrement treatment device comprises a mixing box, a biogas digester and a hydraulic pool; a stirring shaft is arranged in the mixing box in the vertical direction and provided with screw tooth blades, smashing fan blades and a filtering plate from top to bottom in sequence through a mounting , screw teeth used for cleaning away weeds and other flocculent garbage are arranged at the upper portions of the screw tooth blades, and spiral blades are arranged on the smashing fan blades; the filtering plate is of a disc-shaped structure and is provided with multiple annular through holes, an opening matched with the filtering plate is formed in the side wall of the mixing box and connected witha collecting box, an air inlet pipe is arranged at the bottom of the mixing box, multiple air inlets are formed in the air inlet pipe, a deodorization box is arranged above the mixing box, and connected with the biogas diges