The invention relates to sieving equipment in mine, metallurgy and chemical industries, in particular to a cylindrical ore washing machine. The cylindrical ore washing machine comprises a cylinder body device, a transmission device, a supporting roller device, a supporting roller retaining device, a spraying device and a water tank, wherein the cylinder body device is provided with four sections of cylinders, namely a primary ore washing cylinder, a primary sieving cylinder, a secondary ore washing cylinder and a secondary sieving cylinder sequentially. The lower ends of the primary ore washing cylinder and the secondary ore washing cylinder are provided with the supporting roller retaining device and the supporting roller device respectively; and a feed retaining ring is respectively arranged between the primary ore washing cylinder and the primary sieving cylinder and between the secondary ore washing cylinder and the secondary sieving cylinder. The cylindrical ore washing machine can realize the aim of obtaining ore slurry and has good sieving effect and energy-saving effect.