▎ 摘　　要

NOVELTY - The method involves heating the carbon-containing polymers to undergo a cross-linking reaction to obtain an intermediate product. The intermediate product obtained is processed by laser scanning. A mixture of multilayer graphene and porous nano graphite is prepared, and stirred the mixture obtained to obtain powdered graphene. The powdered graphene obtained is put into the two-phase liquid. A high-purity graphene is obtained from the interface layer, and taken rubber as raw material wherein the carbon-containing polymer comprises plastic, rubber and clothes. USE - Preparing high purity graphene prepared by using trash as raw material. ADVANTAGE - The method enables to prepare high-purity graphene, which has high yield, high quality, high surface area graphite or graphene sold by kilogram, even for selling, has great economic potential, and can be prepared in large scale, and has low production cost. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the preparing high purity graphene prepared by using trash as raw material. Scanning rate (2)