Small-particle-size rhizome crop dry cleaning system using soil to wash soil

A small-particle-size rhizome crop dry cleaning system using soil to wash soil comprises a feeding conveying belt, a first dry cleaning module, a second dry cleaning module, a spiral conveyor and a discharging vibration conveying belt, and the feeding conveying belt is used for conveying cyperus esculentus which is not subjected to dry cleaning into the system and has a certain preliminary winnowing function. According to the first dry cleaning module, large soil blocks attached to the surfaces of the cyperus esculentus are smashed and separated through friction and collision between the cyperus esculentus and enter the second dry cleaning module, and meanwhile, the spiral soil feeding conveyor can convey sandy soil to the second dry cleaning module; and the second dry cleaning module enables the sandy soil and the cyperus esculentus to generate friction, residues in small cracks of gullies on the surfaces of the cyperus esculentus are rubbed and dried, then the cyperus esculentus falls on a discharging vibra