Wool and cotton blending method and yarn thereof

The invention discloses a wool and cotton blending method, which comprises the following steps of: preprocessing the wool before blending, opening and cleaning, carding the cotton, combing, drawing, roving, refining a yarn and spooling. A yarn which is made by blending the wool and the cotton is characterized in that the weight percentage of the wool to the cotton is as follows: the wool: the cotton=80:20. The invention has the following benefit effect that: by adopting technologies, the invention overcomes the difficulties that the roll is hardly formed on the drawing and the net is hardly formed on a carding machine when weaving a natural protein fiber with a ring spindle technology, the licking is serious in the working procedure of thickening and thinning, and the wool easily has the static to greatly increase the harmful yarn faults. The method can produce the blended yarn with the high-proportion wool and long staple combed cotton. The yarn not only keeps the heat retention of the wool, but also improve