Method for preparing proton exchange membrane fuel cell supported catalyst

The invention relates to a method for preparing a proton exchange membrane fuel cell supported catalyst. The method comprises: dispersing soluble precursors of a carbon carrier and a metal active component in a mixed solvent of water and glycol in a reactor, stirring, and heating to 70 to 90 DEG C; adding solution of formaldehyde, and stirring at 70 to 90 DEG C for 2 to 3 hours to obtain solution containing a solid product; and filtering, eluting, drying and roasting to obtain the proton exchange membrane fuel cell supported catalyst. When the method of the invention is used, the reaction conditions are mild, the operation is simple, the controllability is high, high-temperature and non-aqueous system is not required, surfactant is not required to be added, and the pH value of the system is not required to be adjusted. The obtained supported catalyst has high dispersibility.