Bridge breaking mechanism for mud bin

The invention belongs to the technical field of sewage treatment, and particularly relates to a sludge bin bridge breaking mechanism which comprises a sludge bin, the sludge bin comprises a cylindrical body and a bottom wall located at the bottom of the body, and a discharging opening is formed in the bottom wall; the scraping disc is rotationally arranged on the inner side of the bottom wall, the scraping disc is connected with a driving element arranged below the mud bin, the driving element is configured to be capable of driving the scraping disc to rotate forwards or backwards, and the scraping disc comprises a plurality of scraping arms; the toothed plate assembly is attached to the inner wall of the body, and the toothed plate assembly is movably arranged up and down relative to the body. Sludge on the inner wall of the tank body is loosened through the toothed plate assembly moving up and down, the bridging phenomenon can be relieved after the binding force between the sludge and the inner wall of the