A method of coating copper-tungsten composite material is provided to form a coating layer by a simple process, and to coat a uniform composite material layer of high density without pollution caused by impurities. A method of coating copper-tungsten composite material comprises the steps of: preparing coating particles by mixing tungsten particles with copper particles, and coating the tungsten particles and copper particles on an object by spraying the particles in high speed through a cold spraying process. An average grain size of the tungsten particles is 40 to 60% of an average grain size of the copper particles. The average grain size of the copper particles is 5 to 40um.
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