Method for preparing single yarn enwound by dyed yarn through flax wet spinning and siro spinning

The invention discloses a method for preparing single yarn enwound by dyed yarn through flax wet spinning and siro spinning, comprising the following steps: (1) firstly dying one (or two) rough yarn(s) to prepare dyed rough yarn; (2) binding the dyed rough yarn with the other rough yarn (maybe half bleached yarn, gray yarn or dyed yarn) to spin on a spinning frame, and finally forming the single yarn enwound by dyed yarn. The single yarn looks like plied yarn, but is single yarn actually; seen from color, a yarn of one color is enwound by a yarn of the other color, and simultaneously, the procedure of yarn twisting is eliminated.