The invention belongs to the technical field of the processing of Chinese herbal medicines, and particularly discloses a processing method for peeling radix asparagi. The processing method comprises the following steps of (1), pre-treating; (2), freezing; (3), peeling the well frozen fresh radix asparagi by using an radix asparagi peeler, wherein the radix asparagi peeler comprises a frame, wherein the frame is fixedly provided with a lower grinding pan; an upper grinding pan is arranged above the lower grinding pan; the upper grinding pan is connected onto the frame in a sliding manner; the frame is also provided with a horizontal driving mechanism; the lower grinding pan is provided with at least one row of holding cavities for holding the asparagus cochinchinensis; the holding cavitiesare semi-fusiform; the inner walls of the holding cavities are provided with polishing layers; the lower end surface of the upper grinding pan is provided with bristles; a rack is arranged above the upper grinding pan; the upper grinding pan is provided with a plurality of through holes; the through holes are all internally provided with rotating shafts; the lower parts of the rotating shafts areall fixedly provided with negative-pressure blades; the upper parts of the rotating shafts are all fixedly provided with gears in a sleeving manner; gears are all meshed with the racks; one-way bearings are arranged among the rotating shafts and the gears; two sides of the lower grinding pan are both provided with residue removal mechanisms. The processing method is used for peeling the radix asparagi and the peeling efficiency is high.