NOVELTY - Supported catalyst comprising resorcinol, formaldehyde and nitrogen-containing biomacromolecular compound as raw material, is new. The nitrogen-containing biomacromolecular compound comprises cobalamin, chlorophyll, hemoglobin or its derivatives. The catalyst is prepared by mixing resorcinol and solvent to prepare solution A, adding formaldehyde to solution A, heating solution A to obtain sol gel precursor and then curing, drop wisely adding ammonia to cured sol gel precursor to obtain gel, aging gel to obtain solid powder, and heating solid powder and purging to obtain carbon gel carrier.    USE - The supported catalyst is useful as a cathode in proton exchange membrane fuel cell (claimed).    ADVANTAGE - The supported catalyst has high activity, and increases the electrochemical stability of the fuel cell.    DETAILED DESCRIPTION - Supported catalyst comprising resorcinol, formaldehyde and nitrogen-containing biomacromolecular compound as raw material, is new. The nitrogen-containing biomacromolecular compound comprises cobalamin, chlorophyll, hemoglobin or its derivative. The catalyst is prepared by mixing resorcinol and 0.1-1 ml/1 g of solvent to prepare solution A, adding 20-40 wt.% of formaldehyde to the solution A at a ratio of 1:14:1 and then stirring, heating the solution A at 20-100 degrees C to obtain a sol gel precursor, curing the sol gel precursor at 20-70 degrees C, drop wisely adding 0.5-2 M of ammonia or 0.5-2 M of oxalic acid to cured sol gel precursor to obtain a gel, drying and aging the gel for 3-12 days to obtain a solid powder, heat treating the solid powder at 600-1200 degrees C for 1-10 hours in the presence of inert atmosphere and then purging at room temperature to obtain carbon gel carrier, mixing nitrogen-containing biomacromolecular compound and 0.1-100 ml of solvent to prepare solution B and then stirring for 0.5-4 hours in the presence of an inert atmosphere, adding 0.1-10 g of carbon gel carrier with the solution B and then stirring for 0.5-4 hours, heating the obtained product at 80-100 degrees C and then drying to obtain solid powder, heating the solid powder at 500-1200 degrees C for 1-10 hours, and purging the obtained hot product at room temperature in the presence of an inert atmosphere.