NOVELTY - Preparation of a load type platinum-iron intermetallic compound nanoparticle catalyst comprises: (a) adding a precursor containing platinum and iron in sulfuric acid solution, adding ethylene glycol and a carbon carrier in the solution, ultrasonically dispersing, dropping sodium hydroxide solution to regulate pH, adding sodium dihydrogen hypophosphite, stirring in an ultrasonic water bath, filtering and drying to obtain a precursor of highly-dispersed platinum-iron intermetallic compound; and (b) thermally treating the prepared precursor under reducing atmosphere to obtain the product.    USE - The load type platinum-iron intermetallic compound nanoparticle catalyst is useful for proton exchange membrane fuel cell and for electrocatalytic oxidation of methanol.    ADVANTAGE - The method: is simple and suitable for large-scale preparation; prepares the product with a particle size of 3-5 nm; and prepares the high-dispersibility precursor with a particle size of 1-2 nm.    DETAILED DESCRIPTION - Preparation of a load type platinum-iron intermetallic compound nanoparticle catalyst comprises: (a) adding a precursor containing platinum and iron in sulfuric acid solution, adding ethylene glycol and a carbon carrier in the solution and ultrasonically dispersing for 30 minutes, dropping 5 mol/l sodium hydroxide solution to regulate the pH to 11 while stirring in a water bath, adding a sodium dihydrogen hypophosphite reducing agent, stirring in ultrasonic water bath for 10 hours at 65 degrees C, filtering in vacuum and drying to obtain the precursor of highly-dispersed load-type platinum-iron intermetallic compound, where the atom ratio of platinum to iron is 1:1 or 3:1 and the concentration of the sulfuric acid solution is more than 1mol/l; and (b) thermally treating the prepared precursor for 0.5-3 hours at 400-700 degrees C under reducing atmosphere to obtain the product, where the precursor containing iron is ferrous sulfate and the precursor containing platinum is chloroplatinic acid or platinum tetrachloride.