Sewage purification device for environmental protection

The utility model relates to the technical field of sewage purification devices, and discloses a sewage purification device for environmental protection, which comprises a support frame, the upper surface of the support frame is fixedly connected with a filter vat, the left side surface of the filter vat is fixedly connected with a driving motor, and the output end of the driving motor is fixedly connected with a first rotating gear. Second rotating gears are arranged on the front side and the rear side of the first rotating gear correspondingly, and the first rotating gear is engaged with the second rotating gears. According to the sewage purification device for environmental protection, an electric push rod drives a push frame to drive a push rod, a sliding rod and a clamping rod to push a stable arc plate to move downwards for sealing and fixing, a better sealing and fixing effect on a filter barrel and a sealing arc plate is achieved, and rapid replacement is more convenient while the fixing effect is gua