▎ 摘　　要

NOVELTY - Preparing graphene by taking lignin as raw material comprises (i) loading catalyst and lignin of ratio 1:8-1:3 into ceramic sample boat, placing the sample boat into hinged tubular furnace and introducing inert protective gas at the speed of 500-2000 ml/minute for 5-30 minutes, where the lignin is alkali lignin, lignin sulfonate, ground wood lignin or solvent-based lignin; (ii) heating from room temperature to 500-1500 degrees C at the rate of 5-30 degrees C/minute for 30-120 minutes; and (iii) cooling to room temperature, washing sample with deionized water, vacuum filtering and drying at low temperature. USE - The method is useful for preparing graphene by taking lignin as raw material (claimed). ADVANTAGE - The method is simple, produces product with high yield and good quality.