NOVELTY - Preparing sulfide poisoning resistant catalyst involves adsorbing molybdate on functional Vulcan XC-72 (RTM: carbon powder), by chemical adsorption and baking under the protection of nitrogen or argon so as to obtain carbon supported molybdenum trioxide; then loading platinum on the molybdenum trioxide/carbon by a chemical reduction method.    USE - For preparing sulfide poisoning resisting fuel battery cathode catalyst (claimed) used in fuel battery for electric automobile, and for spacecrafts and portable electronic devices such as laptops and electronic toys.    ADVANTAGE - The method is simple and feasible; has low cost; and provides sulfide poisoning resisting fuel battery cathode catalyst having excellent antisulfide poisoning performance and oxygen reduction catalyst activity compared to commercial Pt/C catalyst.    DETAILED DESCRIPTION - Preparing sulfide poisoning resisting fuel battery cathode catalyst involves: (1) functionalization of carbon carrier: weighing 1 g of Vulacn XC-72 (RTM: carbon powder), adding 150 ml of 30% mixed solution of hydrogen peroxide and concentrated sulfuric acid in volume ratio of 1:4, ultrasonically stirring for 3 hours, diluted by ultrapure water and statically arranged for 24 hours so as to filter the supernatant liquor, centrifugally washing the supernatant liquor, dried and crushed to obtain functionalized Vulacn XC-72 carbon powder; (2) preparation of MoO3/C: according to the mass ratio of carbon powder (obtained in the step (1)) to molybdate of 1:0.01:0.1, ultrasonically oscillated uniformly in deionized water as the solvent, stirred continuously for 12-24 hours, dried at 60-95 degrees C, and then crushed, where the mixture powder is arranged at 100-180 degrees C under nitrogen or argon for 30-60 minutes, and then warmed to 350-450 degrees C for 4-8 hours, and cooled so as to obtain the MoO3/C catalyst; and (3) preparation of Pt-MoO3/C catalyst: according to mass ratio of chloroplatinic acid to sodium citrate to MoO3/C being 1:1 to 3:1 to 10, the chloroplatinic acid, the sodium citrate and the MoO3/C catalyst obtained in the step (2); the excessive amount of glycol solvent is added with all the MoO3/C catalyst, sodium citrate and chloroplatinic acid for ultrasonically stirring for 8-17 hours; then, pH value is adjusted as 8-11 by using 5% of sodium hydroxide glycol solution, ultrasonically stirred for 10-30 minutes; the mixed solution is transferred to the reaction kettle for reacting at 120-160 degrees C for 4-8 hours; then, the product is filtered, washed, dried, crushed and vacuumized at 50-80 degrees C for 5-24 hours so as to obtain the Pt-MoO3/C catalyst.