The invention discloses a ferro-aluminum bimetal casting technology. The ferro-aluminum bimetal casting technology comprises the steps of carrying out alkaline washing on a steel package casting piece to remove fluorine and chloride, cleaning by clear water, carrying out acid cleaning, cleaning by clear water, drying, spraying paint on non-conjunction surface, carrying out surface melting, thermally covering zinc alloy, treating in Al-Si molten alloy, and rapidly putting in a cavity to pour aluminum alloy. The ferro-aluminum bimetal casting technology disclosed by the invention has the beneficial effects that through a ferro-aluminum bimetal casting structure, a series of problems of wear resistance, thermal conductivity, size stability and the like of machine parts are improved.