▎ 摘　　要

NOVELTY - Preparation of graphene thin film involves cutting electroconductive glass into pieces with size of 3 cmx 1 cm using glass cutter, washing, forming graphite oxide colloid or suspension in water by ultrasonic waves and then adding 1 mg/mL N,N-dimethylformamide solution, dripping resultant solution on the cleaned glass, drying, and carrying out electrolysis process using processed glass as working electrode and potassium chloride solution as electrolyte, under constant electrical potential. USE - Preparation of graphene thin film (claimed). ADVANTAGE - The method enables economical and simple preparation of graphene thin film by environmentally-friendly process.