Regenerated cotton fiber and yarn spinning method thereof and textile weaving method

The invention discloses a regenerated cotton fiber and a yarn spinning method thereof and a textile weaving method. The regenerated cotton fiber is prepared by using a following preparation method including the steps that large-grained solid impurities in textile wastes are removed first, according to fiber compositions and color features, classification is conducted, and classified textile wastesare obtained; the classified textile wastes are cut into classified textile waste fragments with the length of 2-3 centimeters; a first nourishing solution and a second nourishing solution are addedto the classified textile waste fragments by using a fiber nourishing device in sequence, and a nourished textile fabric is obtained; the nourished textile fabric is subjected to multi-stage opening,the fiber with the length of 14-20 millimeters is collected, and the regenerated cotton fiber is obtained. The length of the regenerated cotton fiber is ensured, the spinnability of the regenerated cotton fiber is improved, and