The invention discloses an aluminum alloy rainbow color conduction oxidation process. The conduction oxidation process comprises the following steps of sand blasting, oil removal, alkali washing, chemical polishing, conductive oxidation coloring and drying. According to the conduction oxidation process, sand blasting and drying processes are additionally arranged, meanwhile important technologicalparameters in the process steps are adjusted, so that the appearance of a aluminum alloy product has metal texture, and the requirement for electromagnetic shielding performance is met; the formed rainbow color oxidation film is excellent in performance, and the neutral salt spray time can reach 200h and is far beyond the military standard requirement; and the conduction oxidation process has theadvantages that the production efficiency is high, the one-step pass percent of electric conduction and oxidation of the obtained aluminum alloy product can reach 91%, and large-scale industrial production is facilitated.