NOVELTY - Low platinum modified carbon supported ruthenium nanoparticle is prepared by dissolving ruthenium chloride (RuCl3) in glycol solution, adding active carbon, adjusting pH with glycol solution of sodium hydroxide (NaOH), performing oil bath reaction, water scrubbing and propanone rinsing until no chloride ion, and drying vacuum; and placing ruthenium/carbon (Ru/C) in 180 degrees C hydrogen atmosphere, cooling at 50 degrees C, adding perchloric acid (HClO4) solution of potassium platinum(II) chloride (K2PtCl4), stirring, filtering and washing, and heating to dry in vacuum for 12 hours.    USE - Method for preparing low platinum modified carbon supported ruthenium nanoparticle used as catalyst of the anode of a methanol fuel cell (claimed).    ADVANTAGE - The Ru nanoparticle is modified on the surface by Pt, to lower content of Pt in binary catalyst.    DETAILED DESCRIPTION - Preparation of low platinum modified carbon supported ruthenium nanoparticle comprises dissolving ruthenium chloride (RuCl3) in glycol solution on a ratio (g/L) of mass of RuCl3 to volume of ethanol at 1:3, adding active carbon to solution, stirring ultrasonically at 500 rpm for 30 minutes, adjusting pH to 4 with glycol solution of 2 mM sodium hydroxide (NaOH), and reacting in 170 degrees C oil bath for 3 hours; performing vacuum filtration at 50 degrees C, washing with deionized water for 3 times, rinsing with 99.7% propanone solution until no chloride ion in filtrate, and drying in vacuum at 70 degrees C for 12 hours to obtain ruthenium/carbon (Ru/C); and placing Ru/C at 180 degrees C in hydrogen atmosphere for 2 hours, cooling at 50 degrees C at normal pressure under protection of argon, adding 0.1 M perchloric acid (HClO4) solution having 1 mM dipotassium platinum(II) tetrachloride (K2PtCl4), stirring at 500 rpm for 15-16 hours, performing vacuum filtration, washing with deionized water for 3 times, heating at 70 degrees C, and drying in vacuum for 12 hours to obtain inventive low platinum modified carbon supported ruthenium nanoparticle, with added 0.1 M HClO4 solution of 1 mM K2PtCl4 at ratio of mass of Ru/C to volume of 0.1 M HClO4 solution of 1 mM K2PtCl4 of 20 mg:12 ml.