Ramie and cotton blended yarn as well as preparation method, system and application thereof

The invention discloses ramie and cotton blended yarn as well as a preparation method, a system and application thereof. The preparation method comprises the following steps: implementing a blowing-carding technique to perform loosening, mixing, primary cotton cleaning and primary cotton carding treatment on ramie fiber and cotton fiber respectively, and further performing secondary cotton cleaning and secondary cotton carding treatment respectively, so as to obtain ramie card slivers and cotton card slivers; combining the ramie card slivers and the cotton card slivers to obtain drawn slivers; performing crude yarn treatment and fine yarn treatment on the drawn slivers sequentially, thereby obtaining the ramie and cotton blended yarn. According to the preparation method, the blowing-carding technique is adopted for primary cotton cleaning and primary cotton carding treatment, and secondary cotton cleaning and cotton carding treatment are further implemented, so that the loosening and carding of the ramie fibe