The invention discloses a potato cleaning machine based on water jet. The potato cleaning machine based on water jet comprises a base and a water inlet pipe connector, wherein a rotary top cover is arranged at the top end of the shell through a rotary shaft in a matched manner; the water inlet pipe connector and a top cover handle are respectively arranged at the top end of the rotary top cover and on the outer side wall of the rotary top cover; a sprayer is mounted on the bottom surface of a cavity of the rotary top cover; the bottom end of the rotary shaft is connected to a connecting shaft of a motor assembly in a cavity of the base; a brush cap is mounted at the top end of the rotary shaft; a brush ring is mounted on the inner wall of a rotary cavity; a brush sleeve mounted on the outermost layer of a drum mounted between the outer wall of the rotary shaft and the inner wall of the rotary cavity also rotates due to the effect of the centrifugal force of potatoes; and by brush type structures which are mounted on the bottom surface and the side wall of the rotary cavity, the potatoes are cleaned at multiple angles. The working efficiency is improved, the practicality is quite high for small-area places in the catering industry, and the potatoes to be used can be cleaned when used.