Grinding roller of potato grinder

Provided is a grinding roller of a potato grinder for starch processing machinery. The grinding roller comprises a spindle. The spindle is provided with a grinding roller body composed of a round partition plate, a round sawtooth piece and a pair of round clamping press plates respectively arranged at two ends of the spindle, wherein the round partition plate, the round sawtooth piece and the pair of round clamping press plates are arranged at intervals. Circumferential teeth of the round sawtooth piece protrude out of the cylindrical surface of the roller body to form roller teeth of the grinding roller, and the center of each round clamping press plate is provided with a fastening threaded hole matched with an external thread arranged at the end of the spindle. A combined assembling structure is adopted, and processing production, assembly and maintenance are facilitated. The round sawtooth piece and the round partition plate are combined to form the roller body, the circumferential teeth protruding out of