Recycled aluminum industry has great prospects in china. Early identification of key technologies for recycled aluminum plays a very important role in the healthy development of recycled aluminum industry. This paper studies the key technologies of recycled aluminum by technology roadmap method. Recycled aluminum technologies are evaluated by hierarchical analysis model, which is established by Delphi method, and then the key technologies of recycled aluminum industry are determined. Preliminary results and conclusions from this study point out the direction of technology research and technology upgradation for recycled aluminum industry.