NOVELTY - Preparing high performance proton exchange membrane involves: pre-processing fluorine-containing sulfonic acid type proton exchange membrane into sulfonated poly initiator in solid phase extraction by amino propyl of water solution, soaking for 10-40 minutes at 20-80 degrees C, using de-ionized water to wash film surface, drying by nitrogen, and then soaking film in aqueous solution of compound containing two aldehyde group, using de-ionized water to wash surface of composition, drying by nitrogen, repeating process, to 5-100 layers to obtain high performance proton exchange membrane.    USE - For preparation of high performance proton exchange membrane (claimed).    ADVANTAGE - The method can reduce methanol infiltration capacity; and improves measurement accuracy of proton conductivity.    DETAILED DESCRIPTION - Preparation of high performance proton exchange membrane involves: pre-processing fluorine-containing sulfonic acid proton exchange membrane into sulfonated poly initiator (0.1-5 wt.%), in solid phase extraction by amino propyl (SPES-NH2) in an aqueous solution; soaking for 10-40 minutes at 20-80 degrees C using deionized water to wash the fluorine contained sulfuric acid proton exchange membrane surface, drying by nitrogen, to obtain fluorine-containing sulfonic acid proton exchange membrane A; and then soaking the film in an aqueous solution of compound containing two aldehyde group (0.05-10 wt.%) at soaking temperature of 20-60 degrees C for 10-40 minutes using de-ionized water to wash the fluorine-contained sulfuric acid proton exchange membrane A surface physical adsorption of the compound containing two aldehyde group, drying by nitrogen to obtain perfluorinated sulfonic acid proton exchange film B; soaking proton exchange film B into amido sulfonated poly SPESNH2 (0.1-5 wt.%) in an aqueous solution at 20-80 degrees C for 10-40 minutes, using de-ionized water to wash the fluorine-contained sulfuric acid proton exchange membrane surface physical adsorption containing amino group is sulfonated poly SPES-NH2, drying by nitrogen, to obtain fluorine containing sulfonic acid proton exchange membrane C; repeating the second step and third step, thus there are 5 to 100 layers to obtain the high performance proton exchange membrane.