The invention discloses a preparation method of regenerated cotton. The method comprises the following steps: a, sorting: firstly performing vibratory screening treatment on leftover,
scrap, waste silk and
yarn ends to obtain various cotton
textile scraps; b, pretreating: performing alkaline cleaning, primary washing,
hydrogen peroxide bleaching and secondary washing treatment on the obtained various cotton
textile scraps respectively to obtain a pure white fabric stock with
moisture content of being smaller than 1 percent; c, reprocessing:
cutting the pure white fabric stock into fabrics with a physical character of being smaller than 1,200 mm, then reducing the fabrics into
wool cotton, next loosening the
wool cotton, and finally fluffing the
wool cotton to form the regenerated cotton; d, packing: collecting fibers with length of 26-28 mm in the regenerated cotton, and packing the collected fibers to obtain the qualified regenerated cotton. According to the method, the waste textiles such as the leftover, the cloth
scrap, the waste silk and the
yarn ends are recovered and recycled.