The invention discloses a method for removing the scale of wool, and particularly relates to a method for rapidly removing the scale of wool by a subcritical dry cleaning technology, belonging to the field of wool processing. The method comprises the steps of feeding raw wool materials into a sealed dry cleaning tank, vacuumizing, injecting subcritical dry cleaning solvent with proper quantity into the dry cleaning tank till that a sample is completely soaked, mechanically stirring in an auxiliary way during dry cleaning to improve the dry cleaning effect, and carrying out dry cleaning for 1-4 times under a certain dry cleaning condition; after the dry cleaning, pumping the solvent out of the dry cleaning tank, respectively desolventizing the materials and the dry cleaning agent in an evaporating way, liquidating in a compressing way by a diaphragm compressor, and enabling the liquid solvent to reflow into a solvent recovery tank to be recycled. The method is low in energy consumption, high in dry cleaning efficiency, and good in product quality, the brute force reducing rate of the treated sample is 8.1-1.2%,the elongation at break is 35-48%, the dimensional stability to felting is 2.8-4.5%, the fineness is reduced by 0.8-1.2mu m, the whiteness and the brightness of fibers can be improved compared with those of the raw wool, the moisture regain reaches 11.28-13.40%, and the method is beneficial to the comprehensive use of the raw materials and the realization of high-additional value processing.