▎ 摘　　要

NOVELTY - Graphene-nano silver composite material comprises 1-16 pts. wt. graphene mixed powder, and 1-9 pts. wt. nano silver antibacterial powder. The graphene mixed powder comprises 0.365 pts. wt. graphene, 0.2-25 pts. wt. graphite carbon, and 0.02-10 pts. wt. graphite. The nano silver antimicrobial powder comprises 2-5 pts. wt. silver nitrate, 90-95 pts. wt. zirconium phosphate and 1-5 pts. wt. zinc oxide. USE - Graphene-nano silver composite material. ADVANTAGE - The graphene-nano silver composite material has inhibition rate to colon of bacterial. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a method for preparing graphene-nano silver composite materials, which involves: (A) mixing graphene mixed powder and nano silver antibacterial powder are mixed and crushing to obtain mixture; (B) mixing silver antimicrobial powder by disposing into silver nitrate solution and then adding zirconium phosphate, and zinc oxide, stirring to obtain a first dispersion liquid; and (C) dissolving the dispersion liquid into water to form a second dispersion liquid, stirring at a constant temperature, filter and the filter residue is collected, drying the residue, calcining, and cooling to obtain the desired product.