▎ 摘　　要

NOVELTY - Preparation of graphene material involves mixing metal chloride salt and vegetable oil in a mass ratio of 1:0.05-2 thoroughly, crushing for 10-100 minutes to obtain mixture, placing mixture in tube furnace under nitrogen atmosphere, heating at 600-1200 degrees C for 2-10 hours, and cooling. The metal chloride salt comprises sodium chloride, potassium chloride, calcium chloride, lithium chloride and/or cesium chloride. The vegetable oil comprises soybean oil, rapeseed oil, corn oil, sunflower oil, and/or peanut oil. USE - Preparation of graphene material used in biomedicine, catalysis, aerospace, and new energy applications. ADVANTAGE - The method enables simple, rapid and economical preparation of graphene material with three-dimensional structure, large specific surface area of 200-750 m2/g and pore volume of 0.9-4.5 cm3/g.