▎ 摘　　要

NOVELTY - Preparing porous graphene by catalytic cracking comprises crushing biomass material and sieving calcium salt catalyst according to the quality ratio of 1:1-10, mixing evenly, heating the resulting mixture at 700-1600 degrees C in an inert gas, carbonizing at constant temperature for 1-10 hours and then post-treating the carbonized product. USE - The method is useful for preparing porous graphene by catalytic cracking (calimed). ADVANTAGE - The method is economical and environmentally-friendly.