▎ 摘　　要

NOVELTY - Biodegradable material comprises polylactic acid, thermoplastic starch, epoxy compound and graphene. USE - Used as biodegradable material comprising e.g. polylactic acid. ADVANTAGE - The material improves the mechanical properties and improves the transparency by adding graphene; enhances the compatibility of polylactic acid, thermoplastic starch and graphene with the special structure of epoxy compound; has excellent mechanical properties, strong light transmittance and good surface gloss. The method is simple and requires low device. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing biodegradable material comprising mixing raw materials to obtain mixed material, extruding and granulating the mixed material to obtain the biodegradable material; and a biodegradable film which is prepared by blow-molding biodegradable material.