Biochemical section high-concentration wastewater treatment device

The utility model discloses a biochemical section high-concentration wastewater treatment device which comprises a fixed shell which is in a cylindrical shell shape. An annular baffle is fixedly connected into the fixed shell, the interior of the fixed shell is divided into a first cavity located on the inner side of the annular baffle and a second cavity located between the annular baffle and the inner side wall of the fixed shell through the annular baffle, and the annular baffle and the fixed shell are coaxially arranged. A water outlet is formed in one side of the bottom end of the annular baffle, a first control valve is arranged in the water outlet, a water inlet is formed in one side of the upper end of the annular baffle, and a first one-way valve is arranged in the water inlet; an aeration mechanism and a water changing mechanism are arranged in the first cavity, and the fixed shell is connected with the water changing mechanism through the aeration mechanism; a filtering mechanism for filtering impu