▎ 摘　　要

NOVELTY - Preparing polychlorotrifluoroethylene (PCTFE) composite film, comprises carrying composite suspension containing PCTFE suspension and filler particles on the surface of the substrate material, drying, sintering, then removing the substrate material, where the PCTFE suspension is obtained by mixing PCTFE powder and mixed dispersion medium, the dosage ratio of the PCTFE powder to the mixed dispersion medium is 40-100 g: 100 ml and the mass ratio of the PCTFE suspension to the filler particles is 100: 20-80. USE - The composite film is useful in preparing aerospace, defense and military, electronics, electrical or medicinal and chemicals materials (claimed). ADVANTAGE - The method: does not need high pressure and high cutting; and can ensure uniform dispersion of the filler particles; and the obtained film has excellent mechanical property, conductive, dielectric, heat conduction and size stability. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for PCTFE composite film produced by the above production method, where the thickness of the PCTFE composite film is 5-100 microm.