In the context of the “double carbon” goal and intelligent manufacturing, electrolytic aluminum, as a traditional industry with high energy consumption and high carbon emissions, needs to realize digital, networked and intelligent transformation as soon as possible. This paper analyzes the dilemma faced by the electrolytic aluminum industry in the process of intelligent construction from three aspects: networking, flexible manufacturing and information infrastructure, and then briefly introduces the application advantages of 5G technology in the industrial Internet. Finally, taking the application scenarios of the electrolytic aluminum industry as the starting point, it proposes an industrial Internet application solution based on 5G technology.