NOVELTY - Polymer electrolyte composite membrane preparation involves mixing ammonium carbonate with zirconyl chloride aqueous solution for forming zirconyl carbonate. The obtained zirconyl carbonate is mixed with surfactant. The sodium silicate aqueous solution is gradually added in the mixture for forming multi-component complex inorganic particle. A macromolecular solution is reduced under pressure, evaporated and is concentrated to form another macromolecular solution. The multi-component complex inorganic particle is mixed with latter macromolecular solution.    USE - Method for preparing polymer electrolyte composite membrane for use in manufacturing fuel cell (claimed).    ADVANTAGE - The polymer electrolyte composite membrane preparation method is cost-effective, improves mechanical stability and improves battery capacity due to synergistic effect of inorganic particles.    DETAILED DESCRIPTION - Polymer electrolyte composite membrane is prepared by mixing ammonium carbonate with zirconyl chloride aqueous solution for forming zirconyl carbonate. obtained zirconyl carbonate is mixed with surfactant. The sodium silicate aqueous solution is gradually added in the mixture for forming multi-component complex inorganic particle. A macromolecular solution is reduced under pressure, evaporated and is concentrated to form another macromolecular solution. The multi-component complex inorganic particle is mixed with latter macromolecular solution. The obtained solution is agitated for 20-30 hours at room temperature. The inorganic particle dispersion macromolecular solution is prepared. The prepared inorganic particle dispersion macromolecular solution is casted and dried at room temperature for 24 hours. The dried inorganic particle dispersion macromolecular solution is heated at 120-200 degrees C for 30-90 minutes. An INDEPENDENT CLAIM is included for a polymer electrolyte composite membrane, which comprises a base polymer and a multi-component complex inorganic particle.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of fuel cell having polymer electrolyte composite membrane. (Drawing includes non-English language text).