▎ 摘　　要

NOVELTY - Preparing negative ion nano composite material involves preparing a graphene activator by reacting graphene oxide with a polyhydroxy or polyamino compound. The graphene oxide is mixed with the polyhydroxy or polyamino compound in a ratio of 1-10:1. The non-electric tourmaline powder is prepared by pulverizing non-tourmaline, controlling the average particle diameter of the non- tourmaline powder to be less than 200 nm and preparing the nanocomposite. The graphene activator and the non- tourmaline powder are mixed according to ratio of 1:10 to 1000, and the solvent is added and heated to carry out the reaction to obtain the nanocomposite having a negative ion emitting function. USE - Method for preparing negative ion nano composite material. ADVANTAGE - The method enables to prepare negative ion nano composite material in a cost-effective manner with high production efficiency.