▎ 摘　　要

NOVELTY - Composite fiber preparation involves immersing primary fiber in a graphene substance dispersion having a particle size smaller than 1 mu m to obtain a fiber impregnated with a rare earth material having a particle size of less than 1 mu m. The obtained graphene material are subjected to another impregnation in a graphene-like substance dispersion having a particle diameter of 1-20 mu m, followed by cooling and drying to obtain the composite fiber. USE - Method for preparing composite fiber used for preparing home textiles, undergarments, protective clothing, warm clothing and socks (claimed). ADVANTAGE - The method prepares the composite fiber in a simple and cost-effective manner with uniform distribution of graphene material, preferably radial direction, increases density of grapheme, and improves electrical conductivity, firmness and fiber washability.