NOVELTY - Preparing high index crystal plane molybdenum nano-catalyst, comprises (i) heating ethylene glycol solution to boil, adding silver nitrate solution; (ii) adding polyvinylpyrrolidone and chloromolybdate into ethylene glycol solution; (iii) centrifuging, adding carbon powder, ultrasonically dispersing, centrifuging, and drying; and (iv) dispersing molybdenum nano-catalyst in water, adding Nafion (RTM: Sulfonated tetrafluoroethylene based fluoropolymer-copolymer) solution, dispersing, adding on a glassy carbon electrode, drying, and scanning under cyclic voltammetry.    USE - The molybdenum nano-catalyst is useful in methanol fuel cell.    ADVANTAGE - The method has easy operation procedure, and produces product with good catalytic property during methanol oxidation process, and non-toxic function.    DETAILED DESCRIPTION - Preparing high index crystal plane molybdenum nano-catalyst, comprises (i) heating ethylene glycol solution to boil, and maintaining the temperature for 8-12 minutes, and adding silver nitrate solution in an amount of 0.0005-0.001 mol/l into the total volume of the reaction liquid; (ii) successively adding 0.1-0.5 mol/l polyvinylpyrrolidone each time into ethylene glycol solution at predetermined time intervals and 0.05-0.1 mol/l chloromolybdate into ethylene glycol solution, and maintaining the temperature for 20-40 minutes; (iii) centrifuging the reaction liquid at 9000-11000 rotations/minute, washing many times using ethanol, adding carbon powder in stoichiometric ratio, and then ultrasonically dispersing, centrifuging, and drying to obtain the required molybdenum nano-catalyst product; and (iv) dispersing molybdenum nano-catalyst in water, adding Nafion (RTM: Sulfonated tetrafluoroethylene based fluoropolymer-copolymer) solution, uniformly dispersing, adding dropwise on a glassy carbon electrode, drying under infrared lamp and using as a working electrode, placing the working electrode in sulfuric acid solution, and performing cyclic voltammetry scan process within a certain electric potential range.