Peanut kernel conveying and screening device and peanut kernel grader

The utility model belongs to the technical field of peanut processing, and provides a peanut kernel conveying and screening device and a peanut kernel grading machine. The peanut kernel conveying andscreening device comprises a conveying and screening roller, and the conveying and screening roller is composed of at least two stages of rollers with the same diameter; each stage of roller is formedby uniformly surrounding a plurality of circular tubes, and the circular tube gaps of each stage of roller are different; the roller close to the feed port is a first-stage roller, the circular tubegap of the first-stage roller is the smallest, and the circular tube gap of the rear-stage roller is gradually increased compared with the circular tube gap of the front-stage roller; a section of spiral blade is arranged in each stage of roller, the spiral blades are arranged on a conveying and screening roller shaft, and the screw pitch of the spiral blades is gradually increased from the firststage of roller to the rear