▎ 摘　　要

NOVELTY - Preparation of graphene powder comprises taking natural crystalline graphite flakes, carrying out Hummer method to obtain graphite oxide mother liquid, and ultrasonically dispersing; adding alkaline substance to neutralize solution, slowly adding organic solution, precipitating, and filtering, where alkaline substance is potassium hydroxide, sodium hydroxide and/or sodium carbonate and organic solution comprises 90-100 % organic solvent and 0-10% water; and high temperature heating at 500-700 degrees C under protection atmosphere, washing to remove impurities, and drying. USE - Method for preparing graphene powder (claimed). ADVANTAGE - The method has simple and easy operation process.