Flat plate filter and filtering method thereof

The invention discloses a flat plate filter and a filtering method thereof.The flat plate filter comprises a base body and a rotatable flat plate body arranged outside the base body, a discharging auger, a distributing device and a washing pipeline are arranged around the base body, a filter screen is arranged on the surface of the flat plate body and detachably arranged on a filter plate on the lower portion, and the filter screen is arranged on the flat plate body. A conical closed container is arranged below the flat plate body, a discharging port and a communicating pipe are arranged on the closed container, a triangular area is further arranged between the discharging auger and the distributing device, the triangular area is composed of first scraping plates on the two sides and reverse blowing air, and the angle between each first scraping plate and the reverse blowing air is 30-45 degrees; the flat plate filter and the filtering method thereof can ensure that materials are flat and stable during use, d