Abstract: A carbon-separated ultrafine nano WC material and a method of preparing the same as well as a use thereof, wherein the carbon-separated ultrafine nano WC material is prepared by a method comprising the following steps: (1) a solution of a tungsten source in deionized water is added into a solution prepared from ethanol, concentrated ammonia and a surfactant, wherein the tungsten source is ammonium metatungstate, sodium tungstate or tungsten chloride, and the surfactant is sodium dodecyl benzene sulfonate, ammonium hexadecyl trimethyl bromide or P123; resorcinol is added after intimate agitation; formaldehyde is then added after intimate agitation; and then agitation at room temperature is continued for 8-28 h to produce a mixed solution; (2) the mixed solution is subjected to hydrothermal reaction, and a mixed polymer is obtained after drying; and (3) the mixed polymer is carburized at a high temperature in CO atmosphere to produce the carbon-separated ultrafine nano WC material.