▎ 摘　　要

NOVELTY - A high dielectric polyimide composite material comprises 1.1-1:1 volume ratio of anhydride monomer and diamine monomer, and doped graphene and nano barium-titanate, where concentration of graphene is 0-3 wt.% and nano barium-titanate is 0-20 wt.%. USE - High dielectric polyimide composite material used for high-performance embedded capacitors, printed circuit boards and other microelectronics components. ADVANTAGE - The material has improved mechanical property. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for preparation of high dielectric polyimide composite material comprising taking graphene and nano barium-titanate, or graphene, adding organic solvent, ultrasonic dispersing for 4-12 hours, adding diamine monomer, stirring for 10-30 minutes, ice bath cooling, adding anhydride monomer, solvent volatilizing, and carrying out imidization reaction at 135-300 degrees C for 2-6 hours.