NOVELTY - Preparing ruthenium oxide composite electrode involves preprocessing nickel foam substrate into an acetone solution for 15 minutes in the ultrasonic vibrator for removing chemical oil. The obtained material is kept in 3 mol per liter solution of hydrochloric acid in water solution. The obtained material is leached for 0.5 hours to remove the foamed nickel substrate surface oxides and then the obtained material is flushed with clean deionized water. The flushed material is dried for future use. The nickel foam substrate is added with ruthenium precursor solution containing nickel chloride.    USE - Method for preparing ruthenium oxide composite electrode used for evoluting hydrogen (claimed).    ADVANTAGE - The method enables to prepare ruthenium oxide composite electrode in simple manner and convenient manner that has unique amd smooth structure.    DETAILED DESCRIPTION - Preparing ruthenium oxide composite electrode involves preprocessing nickel foam substrate into an acetone solution for 15 minutes in the ultrasonic vibrator for removing chemical oil. The obtained material is kept in 3 mol per liter solution of hydrochloric acid in water solution. The obtained material is leached for 0.5 hours to remove the foamed nickel substrate surface oxides and then the obtained material is flushed with clean deionized water. The flushed material is dried for future use. The nickel foam substrate is added with ruthenium precursor solution containing nickel chloride, ruthenium trichloride and urea to obtain ruthenium-containing nickel-based composite oxide as a hydrogen evolution electrode in glycol solvent, where molar concentration of nickel chloride is 1-100 mol per liter, ruthenium trichloride is 0.1-50 mol per liter and urea is 0-200 mol per liter. The preprocessed nickel foam substrate is reacted with ruthenium precursor solution of nickel at 60-300 degrees C for 72 hours. The obtained material is flushed with deionized water and then the flushed is heated at 200-600 degrees C in muffle furnace. The heated material is annealed for 0.5-20 hours and then the annealed material is cooled to to room temperature to obtain ruthenium oxide composite electrode.