Rotary coupling sewage treatment device

The invention provides a rotary coupling sewage treatment device. The rotary coupling sewage treatment device comprises a water inlet pipe, and the interior of the tank body is divided into a decomposition chamber for treating organic matters, a nitrogen removal chamber for treating nitrogen through a sulfur autotrophic denitrification technology and a micro-electrolysis chamber for treating COD (Chemical Oxygen Demand) and total phosphorus; the interiors of the decomposition chamber and the nitrogen removal chamber are rotatably connected with the first disc body, the interiors of the shell, the decomposition chamber and the nitrogen removal chamber are equidistantly provided with the multiple annular baffles, and the interior of the micro-electrolysis chamber is rotatably connected with the second disc body; a plurality of first scraping plates used for cleaning the surface of the baffle are mounted on the side wall of the first disc body, and a second scraping plate used for an inner ring of the baffle is