Abstract: By means of chemical composition analysis, metallographic analysis and neutral salt spray test, the effects of single rare earth Ce content on the microstructure and corrosion resistance of industrial pure aluminum were investigated. The results show that the rare earth element Ce has a good grain refinement effect on the as-cast structure of industrial pure aluminum, which can effectively improve the morphology of impurity phase in the microstructure and improve the corrosion resistance of pure aluminum as well. In addition, the corrosion resistance of pure aluminum samples with a single rare earth Ce content of around 0.07% is better.