The invention relates to a method for removing hydrogen gas through CO mixed gas selective oxidation and mainly solves the technical problems of low hydrogenation rate and high CO loss rate in the prior art. The method is characterized in that CO mixed gas containing hydrogen gas is adopted as raw materials, under the conditions that the mol ratio of the hydrogen gas in the raw materials to oxygen gas is (0.5-5):1, the reaction temperature is 100-300 DEG C, the volume space velocity is 100-10000 hour<-1>, and the reaction pressure is -0.08MPa to 5.0 MPa, the raw materials are in contact with a catalyst bed layer adopting platinum-containing metals as active ingredients in a mixing bed, and hydrogen gas in reaction effluents is oxidized into water, wherein catalysts diluted with inert fillings are filled between bed layers of the catalyst bed layer with the distance being 1/10 to 5/6 from the inlet part. Through the technical scheme, the problem is perfectly solved, and the method can be used in CO mixed gas oxydehydrogenation industrial production.