An acid leaching step in which a leachate is obtained by leaching a metal mixture containing at least one or more divalent or trivalent metals selected from nickel, cobalt, manganese, palladium, platinum, copper and zinc with vanadium with an acid. Then, an aqueous ammoniacal solution is added to the leachate to adjust the pH to 10 to 12, and an ammine complex of divalent or trivalent metal ions and an anion complex of tetravalent and / or pentavalent vanadium ions are added to the aqueous alkaline solution. Bivalent or trivalent metal ions in an ammine complex are selectively adsorbed by adding a carrier having a carboxyl group to an aqueous alkaline solution in which an ammine complex and an anion complex are formed, and a complex-forming step to be produced. Or a divalent or trivalent metal recovery step for recovering trivalent metal ions, and an alkali solution after recovery of the divalent or trivalent metal ions. Vanadium recovery step of recovering vanadium from on complex, characterized by having a.
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