Graded filtering device for peanut oil squeezing and filtering method thereof

The invention discloses a graded filtering device for peanut oil squeezing and a filtering method thereof, and relates to the technical field of peanut oil, the graded filtering device comprises a filtering tank, the filtering tank is a cylindrical tank body, the upper end of the filtering tank is provided with a feeding port, and the bottom of the filtering tank is in threaded connection with an oil guide pipe; a filtering assembly is arranged in the filtering tank, the filtering assembly is arranged on the top wall of the filtering tank through a rotating assembly, the filtering assembly comprises a first filtering net, a second filtering net, a third filtering net, ribs and connecting blocks, and the first filtering net, the second filtering net and the third filtering net are inverted-circular-truncated-cone-shaped pocket nets; the aperture of the filter holes in the first filter screen is larger than that of the second filter screen, the aperture of the filter holes in the second filter screen is larger