▎ 摘　　要

NOVELTY - The method involves mixing graphite oxide and melamine to obtain acetone solution according to mass ratio of 4: 1. The acetone solution is boiled for removing acetone. The boiled acetone solution is dried in a drying box. Nitrogen-doped graphite alkene is mixed with ethanol at temperature of about 60 degrees centigrade. A glass substrate is cleaned by mixed solution. The cleaned glass substrate is placed in an oven to perform heating operation. A composite dielectric film is formed. High purity coating conductive silver paste is coated on the composite dielectric film. USE - Nitrogen-doped graphene/PVDF composite dielectric thin film preparation method. ADVANTAGE - The method enables preparing a thin film with high strength, high stability, high conductivity and large surface area, and improving polymer-base composite material utilization rate.