Abstract: Hexavalent chromate is commonly used in chemical oxidation solution of aluminum alloy. Hexavalent chromium ions with high pollution and not easy sedimentation not only cause harm to the health of operators, but also seriously pollute the environment. Therefore, countries all over the world are developing environmentally friendly aluminum alloy chemical oxidation process. The research status of hexavalent chromium free chemical oxidation treatment for aluminum alloys at home and abroad is reviewed, and its development prospects are analyzed.