NOVELTY - Forming high dielectric constant polymer composite film involves dissolving dielectric polymer in an organic solvent to obtain dispersion; spreading dispersion on Langmuir-Blodgett membrane of ultra-pure water groove and having dielectric polymer film; dissolving nanoparticles and oxidant in second organic solvent and ultra-pure water to obtain second dispersion; depositing second dispersion on dielectric substrate, then performing chemical vapor deposition using conductive polymer and monomer, forming dielectric polymeric film on surface of the composite film and heating the film.    USE - For manufacturing a high dielectric constant polymer composite film (claimed).    ADVANTAGE - The present method is simple, reasonable and easy to operate; and provides composite film having self-supporting characteristics, in high-energy density capacitors and other energy storage devices.    DETAILED DESCRIPTION - Manufacturing a high dielectric constant polymer composite film involves: dissolving 1-6 mol/l dielectric polymer in a first organic solvent to obtain dielectric polymer dispersion; spreading the dielectric polymer dispersion on Langmuir-Blodgett (LB) membrane of ultra-pure water groove, where surface of LB membrane has dielectric polymer film; dissolving 20-40 mg/ml nanoparticles and 15-30 mg/ml oxidant in second organic solvent and ultra-pure water, uniformly mixing to obtain nanoparticle-oxidant dispersion; depositing the nanoparticle/oxidant dispersion on a dielectric substrate, to obtain a polymer-oxidant-nanoparticle composite substrate; performing chemical vapor deposition of the substrate using conductive polymer and monomer in an atmosphere to obtain dielectric polymer/conductive polymer/nanoparticle composite film; forming dielectric polymeric film on surface of the obtained dielectric polymer/conductive polymer/nanoparticle composite film to form dielectric polymer/conductive polymer/nanoparticle/polymer composite thin film; and heating the resultant thin film and peeled from the substrate.