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This utility model relates to the field of pellet mill pressure roller cleaning technology, specifically a self-cleaning device for pressure roller anti-clogging that is easy to disassemble. It includes two pressure rollers, with their left and right ends rotatably connected to the inner walls of the left and right sides of a housing. Connecting frames are clamped on both the front and rear sides of the top of the housing. A collection box is located at the bottom of the connecting frame near the pressure roller. A connecting support plate is located above the collection box on the connecting frame, and a buffer mechanism is fitted into the connecting support plate near the pressure roller. In this improved self-cleaning device, the connecting frame allows for quick clamping and disassembly of the self-cleaning components. The collection box collects feed residue scraped from the pressure roller surface by the scraper, preventing the accumulation of impurities and blockage. The buffer mechanism ensures that the scraper tip always remains obliquely in contact with the pressure roller surface, effectively removing feed residue. The magnetic suction plate and magnetic suction sheet allow for quick replacement and installation of the scraper and buffer mechanism.