Sewage treatment tank sludge discharge device based on environmental protection

The invention relates to the field of sewage treatment, in particular to a sewage treatment tank sludge discharge device based on environmental protection. A sewage treatment tank sludge discharge device based on environmental protection comprises a baffle, a scraper and a cutting assembly, is used for cleaning sludge in a sewage treatment tank, and is arranged in a water tank and close to the side wall of the water tank, so that the scraper abuts against the two opposite side walls of the water tank; as the baffle capable of sliding in the height direction of the scraper is arranged at the upper end of the scraper, when one side of the lower end of the baffle makes contact with sludge, one side of the baffle slides in the height direction of the scraper; when the scraper slides along the bottom of the water tank, the height of the baffle can be changed according to the amount of sludge on the two sides, sewage treated through a chemical mode, impurities and the like are precipitated to form sludge, the sludg