▎ 摘　　要

NOVELTY - Preparing biomass graphene comprises pretreating crop straw by weak acid gas explosion, separating the cellulose in the straw and catalyzing the cellulose, performing semi-carbonization process and high-temperature carbonization process, subjecting obtained carbide to high-pressure gas explosion treatment to obtain biomass graphene product having excellent conductivity. USE - The biomass graphene is useful in the field of biomass energy storage. ADVANTAGE - The biomass graphene has improved electrical conductivity and purity, low production cost; and implements production mode combining agricultural and sideline products processing industry and biomass energy industry; ensures considerable income to farmers and realizes accurate poverty alleviation of local farmers.