The invention discloses a dry cocoon shell reeling method, which comprises the following operating steps of impregnating dry cocoon shells for 24 hours in clear water, and draining the water; impregnating the impregnated cocoon shells for 4 to 5 hours in lime water at mass concentration of 0.08 to 0.12 percent; boiling the cocoon shells for 20 to 40 hours by using alkaline water at mass concentration of 0.2 percent; impregnating the boiled cocoon shells for 2 to 3 hours by circulating clear water, and flushing the cocoon shells by using clear water; spin-drying the cocoon shells for 5 to 8 hours to obtain available silk floss by using a washing machine. According to the method, 40 to 60 kilograms of silk floss can be processed every day, the quality of the silk floss is the same as that of conventional purely-manually processed silk floss, the silk floss is white and soft, and related silk floss detection requirements are completely met.