The invention discloses a potato peeling machine. The machine is characterized by comprising a base, moving wheels and a peeling cylinder, a motor is arranged in the center of the inner bottom of a cavity of the peeling cylinder, the output end of the motor extends to the middle of the peeling cylinder, and a rotating disc is fixedly connected to the end of the motor; a pushing roller shaft is arranged at the center of the top of the rotating disc, a spiral blade is arranged on the pushing roller shaft, and a driven gear sleeves the end of the portion, at the bottom of the rotating disc, of apeeling roller; the driven gear is meshed with a gear ring, and a steel wire brush is arranged on the portion, at the top of the rotating disc, of the peeling roller; peel outlet through holes are formed in the side wall, between the bottom of the rotating disc and the gear ring, of the peeling cylinder; inner trays are arranged on the portions, at the ends of the peel outlet through holes in thecavity of the peeling cylinder, on the side of the peeling cylinder; outer trays are arranged on the portions, at the ends of the peel outlet through holes outside the cavity of the peeling cylinder,on the side of the peeling cylinder; water drainage pipes are arranged at the bottoms of the outer trays, the side of the peeling cylinder is provided with a discharge door and an observation door, and a ventilation strip hole is formed in the observation door. The machine has the advantages of being simple in structure, good in peel separation effect and high in working efficiency.