NOVELTY - A carbon carrier is graphitized, placed in a fire-resistant graphite crucible, heated in graphitized furnace, vacuumized and cooled. Then, the graphitized material is dipped in hydrochloric acid solution, filtered, washed and dried. Then, platinic chloride solution is added into flask, stirred, formaldehyde and sodium hydroxide solution are added, to obtain a solution. Then, the graphitized material is dipped in isopropanol and added into solution, heated, cooled, carbon dioxide is supplied, filtered, washed and dried, to obtain stability-improved platinum-carbon catalyst.    USE - Method of improving stability of catalyst used for fuel cell.    ADVANTAGE - The method is simple, economical and provides catalyst having excellent stability.    DETAILED DESCRIPTION - A carbon carrier is graphitized, the carbon carrier material is placed in a fire-resistant graphite crucible, heated in high-temperature graphitized furnace, vacuumized at 10 Pa, vacuumization process is stopped when heated at 1000-2900 degrees C for 0.5-20 hours in air pressure of 0.09 MPa under high-purity argon gas and the graphitized material is cooled to room temperature. Then, the graphitized material is dipped in hydrochloric acid solution having concentration of 0.01-10 mol/L for 2-12 hours, filtered, washed with water until there is no chloride ion and dried in a drying oven at 100 degrees C. Then, platinic chloride solution (10 mg/ml) is added into a three-necked flask in presence of nitrogen, stirred, formaldehyde as reducing agent and 5% of sodium hydroxide solution are added, to obtain a solution. Then, the graphitized material is dipped in isopropanol and added into the solution, heated at 80 degrees C for 1 hour, cooled to room temperature, carbon dioxide is supplied for 1 hour, filtered, washed until there is no chloride ion and dried in the drying oven at 100 degrees C, to obtain platinum-carbon catalyst including 5-70% of platinum. Alternatively, the catalyst is reduced with glycol instead of using formaldehyde. The platinum-carbon catalyst is mono-metallic carbon carrier catalyst. The catalyst is bi-metallic carbon carrier catalyst or multi-metallic carbon carrier catalyst. The bi-metallic carbon carrier catalyst or multi-metallic carbon carrier catalyst is platinum-ruthenium-carbon type, platinum-iridium-carbon type, platinum-iron-carbon type, platinum-cobalt-carbon type and platinum-nickel-carbon type catalysts. The high-purity inert gas is argon gas, nitrogen, helium or mixed gas. The carbon carrier material is chosen from Vulcan XC-72 (RTM: carbon black), acetylene black, BP2000, Ml300 and active carbon material. The acid such as hydrochloric acid, sulfuric acid, dilute nitric acid, acetic acid solution or other acid medium is used during the process.