NOVELTY - Sulfonated polyether ether ketone (50-90%) having sulfonation degree of 50-70% and obtained by drying polyether ether ketone powder and reacting dried powder with sulfuric acid, polyaniline (5-25%) and heteropolyacid (5-25%) are added, mixed and stirred to obtain film forming solution. The film forming solution is subjected to casting on glass plate tank, dried at 30 degrees C in vacuum drying box, and naturally cooled to room temperature. The product is soaked in deionized water and a composite proton exchange film is manufactured.    USE - Manufacture of composite proton exchange film.    ADVANTAGE - The composite proton exchange film is easily and economically manufactured with improved proton electroconductivity, low methanol penetration rate and low heteropolyacid loss rate.    DETAILED DESCRIPTION - Polyether ether ketone powder is dried and dried powder is added to 95-98% concentrated sulfuric acid in ratio of 1 g:(25-30 mL), heated and stirred for 2-3 hours. Reaction liquid is added to ice water mixture, stirred, stood and filtered to obtain deposition polymer. The polymer is washed using deionized water until pH of the solution is neutral, and dried to obtain sulfonated polyether ether ketone having sulfonation degree of 50-70%. The sulfonated polyether ether ketone is dissolved in N-methyl pyrrolidone to obtain 10% sulfonated polyether ether ketone solution. Polyaniline is added to N-methyl pyrrolidone, stirred at room temperature, and filtered to obtain polyaniline filter liquid. A portion of liquid is dried and content of polyaniline in filter liquid is measured. Sulfonated polyether ether ketone solution (50-90%), polyaniline (5-25%) and heteropolyacid (5-25%) are added, mixed and stirred to obtain film forming solution. The film forming solution is subjected to casting on glass plate tank, dried at 30 degrees C in vacuum drying box, and naturally cooled to room temperature. The product is soaked in deionized water and a composite proton exchange film is manufactured.