A method for recycling metal oxides from a waste SCR (selective catalytic reduction) catalyst is characterized in that: crushing, soaking and purifying by adsorption the waste SCR catalyst, adding NaOH solution according to the proportion, heating to 80 DEG C, then adding potassium chlorate to oxidize tetravalent vanadium in the raw material to pentavalent vanadium, regulating aqueous phase pH in the solution to 1.7-1.8 by NH4Cl, boiling for 1-2H, precipitating vanadium, refining to obtain pure ammonium metavanadate, adding HCl into filtrate in which vanadium is separated, regulating the pH to 4.5-5.0, adding CaCl2 solution, precipitating CaMoO4, filtering, and processing filter cake with HCl into H2MoO4 and H2WO4. The method solves the problems that a large number of land resources are occupied by landfill of the waste SCR catalyst, and soil and water resource are contaminated by toxic metals contained in the waste SCR catalyst, and the purpose of changing waste material into things of value and turning harmful things into beneficial things can be achieved.