NOVELTY - A proton exchange membrane fuel cell catalytic agent carrier preparation method involves adding a hexadecyl ammonium expanding layer of montmorillonite comprising hexadecyl trimethyl ammonium bromide and sodium montmorillonite in a weight ratio of 1:0.5 at 60 degrees C with de-ionized water by stirring for 15 minutes to obtain 0.05 grams per ml of montmorillonite suspension. The suspension is added to the hexadecyl trimethyl ammonium bromide at 60 degrees C and allowed to ultrasonic stirring for 30 minutes at 100 degrees C. The stirred mixture is maintained under heating reflux for 24 hours.    USE - Method for preparing proton exchange membrane fuel cell catalytic agent carrier utilized in proton exchange membrane fuel battery field.    ADVANTAGE - The method enables preparing the proton exchange membrane fuel cell catalytic agent carrier in a simple and inexpensive manner, and realizing high industrial production.    DETAILED DESCRIPTION - A proton exchange membrane fuel cell catalytic agent carrier preparation method involves adding a hexadecyl ammonium expanding layer of montmorillonite comprising hexadecyl trimethyl ammonium bromide and sodium montmorillonite in a weight ratio of 1:0.5 at 60 degrees C with de-ionized water by stirring for 15 minutes to obtain 0.05 grams per ml of montmorillonite suspension. The suspension is added to the hexadecyl trimethyl ammonium bromide at 60 degrees C and allowed to ultrasonic stirring for 30 minutes at 100 degrees C. The stirred mixture is maintained under heating reflux for 24 hours and cooled to 60 degrees C and filtered at 60 degrees C by washing with the de-ionized water for about 3 times in 24 hours. The filtered product is ground to obtain a hexadecyl ammonium expanded layer montmorillonite. The layer of montmorillonite is prepared by adding cetyl ammonium expanding layer montmorillonite and a quaternary ammonium salt in the mass ratio of 1:1-4. The added mixture is dispersed in the de-ionized water for stirring at 3-8 hours to form 0.01-0.1 grams per ml of salt expanding layer montmorillonite suspension. The suspension is added with ethylene glycol, propanetriol or isopentyldiol in a volume ratio of 1:1-4 and added with the cetyl ammonium expanding layer montmorillonite suspension. The resulting mixture is stirred for 1-3 hours and transferred to a reaction kettle at 120-180 degrees C for 4-8 hours, followed by cooling and filtering to obtain a peeled off montmorillonite mixture. The mixture is added with the de-ionized water and quaternary ammonium salt in the reaction kettle for stirring at 1-3 hours to form 0.01-0.1 of a primary exfoliated montmorillonite suspension. The obtained suspension is heated at 160-200 degrees C in the reaction kettle and allowed to stand for 10-20 hours. The resulting mixture is cooled and filtered by washing with the de-ionized water and absolute ethyl alcohol for about 3 times at 60 degrees C for 24 hours and allowed to perform grinding to obtain a single sheet montmorillonite. The obtained substance is added with a perfluorosulfonic acid resin in the mass ratio of 1:0.1-0.8, and the added mixture is dispersed in ethanol, glycol or isopropanol at 50-70 degrees C for the ultrasonic stirring at 1-6 hours to form 0.01-0.1 grams per ml of single sheet montmorillonite suspension. The obtained suspension is stirred at 50-70 degrees C for 5-20 hours and transferred to the reaction kettle for heating at 130-140 degrees C in 1-3 hours. The resulting mixture is cooled and filtered by washing with de-ionized water and absolute ethyl alcohol for about 3 times at 60 degrees C in 24 hours and allowed to perform grinding to obtain a coated perfluorinated sulfonic acid resin single sheet montmorillonite.