Method for reducing contents of zinc and copper in smelting ash acid leaching residues

The invention discloses a method for reducing the contents of zinc and copper in smelting ash acid leaching residues. The method is characterized in that the method comprises a pretreatment technology and a leaching technology of the smelting ash acid leaching residues, wherein the pretreatment technology comprises the following steps: stacking the smelting ash acid leaching residues, carrying out hot air baking through utilizing the waste heat of a smelting smoke, overturning with a forklift once every 2-3 days, and airing for 10-30 days; and the leaching technology comprises a step that aired residues undergo oxidation leaching through filling with air under a low acid condition. The method which allows the aired acid leaching residues to be leached again enables the zinc leaching rate to be improved by 10% and the copper leaching rate to be improved by 20%; the method adopting stacking airing does not need special equipment, and basically does not consume energy; and no need of high acid condition and low acid consumption are realized in the leaching of the aired leaching residues.