Self-washing filter

The invention discloses a self-washing filter, which comprises a cylinder body, a filtering plate, a scraping filtering cutter and a fine filtering screen, wherein both ends of the cylinder body are respectively and fixedly connected to a blind plate, the upper end of the cylinder body is provided with a driving motor, the cylinder body is further provided with a water inlet pipe and a water outlet pipe, the interior of the cylinder body is respectively and sequentially provided with a coarse filtering zone, a fine filtering zone and a sewage discharge zone from top to bottom, the coarse filtering zone is provided with a filtering plate, the upper surface of the filtering plate is provided with the scraping filtering cutter, the edge, positioned at the same horizontal surface of the scraping filtering cutter, of the cylinder body is provided with a sewage discharge port, the sewage discharge port is communicated to a sewage holding pipe, the fine filtering zone is provided with a finefiltering screen, the tra