NOVELTY - A side-chain polyaryletherketone anion conducting membrane material comprises benzene ring side chain containing quaternary ammonium salt group polyaryl ether ketone polymer (I).    USE - Membrane material used for anion exchange film fuel cell.    ADVANTAGE - The material has excellent heat resistance, electric insulating property, mechanical property, radiation resistance and strong chemical stability, and can provide fuel cell having excellent thermal stability and mechanical performance.    DETAILED DESCRIPTION - A side-chain polyaryletherketone anion conducting membrane material comprises benzene ring side chain containing quaternary ammonium salt group polyaryl ether ketone polymer of formula (I).    x=0.6-0.75.    An INDEPENDENT CLAIM is included for preparation of side-chain polyaryletherketone anion conducting membrane material comprises using polyaryletherketone anion conducting membrane material of side chain containing quaternary ammonium salt group, and carrying out side chain synthesis of methyl phenyl ether ketone polymer. The side chain and the side chain synthesis of methyl phenyl ether ketone polymer containing quaternary ammonium salt group are polyanionic conducting membrane preparation. The side chain containing a process of methyl phenyl ether ketone polymer, 5-dimethyl phenyl hydroquinone monomer, 1,1,2,2-(4-hydroxyphenyl) hexafluoropropane and 4-difluoro diphenyl ketone monomer as reactant, and 4-difluorodiphenyl ketone monomer is anhydrous potassium carbonate, 3 times solvent to reactant mass. The organic solvent is present at 20-100 vol.% of azeotropy dehydrating agent into container with mechanical stirring and with water, argon gas, raising the temperature to the azeotropic dehydrating agent, reacting for 3-4 hours, removing azeotropic dehydrating agent, heating at 170-190 degrees C, continuing to react for 7-10 hours to obtain the polymer solution in the deionized water, crushing, washing and drying to obtain the side chain methyl phenyl ether ketone polymer, the side chain containing a process of bromine methyl phenyl ether ketone polymer. The side chain contains methyl phenyl ether ketone polymer into a container with the mechanical stirring with the organic solvent, through argon gas, raising the temperature to the polymer is completely dissolved, reducing the temperature to room temperature, adding N-bromosuccinimide and benzoyl peroxide. The reaction is carried out at 80-90 degrees C for 4-8 hours. The reaction vessel is cooled at room temperature. The obtained polymer solution in the absolute methanol, crushing, hot acetone washing for 5 times, drying to obtain the bromine-containing side chain methyl phenyl ether ketone polymer, where the dosage of the organic solvent according to the mass of the side chain containing methyl phenyl ether ketone polymer is 10-15 times of the N-bromosuccinimide to the mol dosage is a polymer containing 2 units of chain section. 2 times, benzoyl peroxide according to the mol dosage is a polymer containing 0 units of methyl chain section. 11 times, the side chain containing the quaternary ammonium salt group ether anion-conducting membrane, where the side chain containing bromine methyl phenyl ether ketone polymer dissolved in a casting solvent, stirring at room temperature for 12 hours, the solution after filtering, spreading and drying on the glass plate, the prepared thin film into trimethylamine aqueous solution with mass concentration of 50%, placing for 48 hours at room temperature, taking out the film, soaking 1M potassium hydroxide aqueous solution, placing for 48 hours at room temperature, taking out the film, washing with deionized water, and storing in deionized water to obtain the side chain containing the quaternary ammonium salt group ether anion-conductive membrane.