The invention relates to the technical field of electrode catalysts. The invention provides a NiMoW nano material and a preparation method thereof. Nickel nitrate, ammonium molybdate and a tungsten source are used as reaction raw materials to prepare the NiMoW nano material by hydrogen thermal reduction. The method is easy to operate and implement, and the obtained NiMoW nano material has excellent catalytic properties. The invention provides a hydrogen electrocatalytic oxidation catalyst electrode material and a preparation method thereof. The method comprises mixing the NiMoW nano material with ethanol, water and a nafion solution to form catalytic ink, and applying the catalytic ink to a glassy carbon electrode as a working electrode of hydrogen electrocatalytic oxidation. The preparation method is simple, low in raw material cost, and good in catalytic performance of the electrocatalytic hydrogen oxidation, and provides a possibility for the non-noble metal as a catalyst for hydrogen electrocatalytic oxidation under an alkaline condition. It can be obtained from the result of the embodiment that the electrode material has HOR activity and good catalytic performance.