NOVELTY - Preparing load type platinum-based anode catalyst comprises adding graphene nanosheets to N-methyl pyrrolidone, carrying out ultrasonic dispersion to obtain graphene dispersion liquid, preparing polyaniline solution by dispersing polyaniline in N-methyl pyrrolidone, mixing graphene dispersion liquid with polyaniline solution, filtering and dissolving filter cake in mixed solvent, carrying out ultrasonic dispersion to obtain polyaniline modified graphene solution, stirring, adding chloroplatinic acid solution, reacting, filtering and washing filter cake to obtain solution, and vacuum drying.    USE - The catalyst is useful for direct methanol fuel cell (claimed).    ADVANTAGE - The method is simple; has controllable process condition; improves the dispersibility of graphene; improves the stability and distribution uniformity of platinum catalyst particles in the graphene.    DETAILED DESCRIPTION - Preparing load type platinum-based anode catalyst comprises adding 1-20 nm thickness graphene nanosheets to N-methyl pyrrolidone, carrying out ultrasonic dispersion to obtain 0.5-2 mg/ml graphene dispersion liquid, preparing 0.2-0.3 mg/ml polyaniline solution by uniformly dispersing polyaniline in N-methyl pyrrolidone according to graphene to polyaniline mass ratio of 1:(0.01-0.025), stirring at room temperature, mixing the graphene dispersion liquid with polyaniline solution for 12-36 hours, filtering and dissolving the filter cake in a mixed solvent of deionized water and ethylene glycol, stirring and carrying out ultrasonic dispersion to obtain polyaniline modified graphene solution, stirring at 110-130 degrees C, adding 0.1 M chloroplatinic acid solution to polyaniline modified graphene solution, where the ratio of platinum to the total weight of graphene and polyaniline is 0.025:1, reacting for 3-5 hours, filtering and washing the filter cake successively with deionized water and ethanol to obtain a solution without ethylene glycol and vacuum drying to obtain the catalyst with particle diameter of 2-3 nm. The load type platinum-based anode catalyst uses a composite material of graphene and polyaniline as a carrier, and the amount of carrier is 20% of the total weight of the catalyst.