The invention discloses an environmental protection apparatus for sewage purification. The apparatus comprises a shell, a first accommodating chamber is arranged in the shell, the bottom of the firstaccommodating chamber is communicated with a conical chamber which extends downwards, a rack body with the front and back end surfaces being in sliding fit connection with the front and back inner walls of the first accommodating chamber is arranged in the first accommodating chamber, a screw rod which extends leftwards and rightwards and is in screwed fit connection with the rack body is arrangedin the rack body, a sunk groove is arranged in the top surface of the rack body, top racks which extend upwards are fixedly arranged at the left side and the right side of the top of the sunk groove,a clamping sleeve is arranged between the left top rack and the right top rack in a rotating fit connection manner, the external surface of the clamping sleeve is fixedly provided with a first convexwheel, a clamping shaft which extends leftwards and rightwards is arranged in the clamping sleeve in a sliding fit connection manner, and the left side extension tail end of the clamping shaft is inrotating fit connection with the left side inner wall of the first accommodating chamber. The environmental protection apparatus for sewage purification has the advantages of simple structure, convenience in operation, improvement of the breaking efficiency and the breaking uniformity, and improvement of the safety of breaking work.