The invention relates to a cleaning device for leather machining and belongs to the technical field of leather machining. The cleaning device for leather machining comprises a body and supporting legs. The body is provided with a feeding roller, a cleaning box, a brushing plate, a guide roller, a heating unit, a temperature sensor, a water pump, a drying box and a material collecting roller. The cleaning box is provided with a water inlet, a first cleaning roller, a second cleaning roller and a water outlet. The drying box is provided with an air inlet, a first drying roller, a second drying roller and a water outlet. According to the cleaning device for leather machining, circular flushing and immersion scrubbing are sequentially conducted on leather with a cleaning solution, so that thetwo sides of the leather are effectively cleaned, cleaning is more thorough, the cleaning efficiency is high, the water use cost is reduced, drying and collecting are conducted on the dried leather, the drying effect is good, the work load is lowered, and leather machining is the follow-up work stage is convenient.