To improve thecorrosion resistance of the 5xxx aluminum alloy surface,Al0.8FeCoNiCrCux(x=0, 0.25, 0.5, 0.75, 1.0) coatings were prepared on the surface of the alloy vialaser deposition.The crystal texture, micro-structure, andcorrosion resistance of the deposition were analyzed via XRD, SEM and electrochemical workstations.The results demonstrate that with the increase in the quantity of Cu, the phase structure of the HEA changes from BCC1 and BCC2 to BCC1, BCC2, and FCC. Furthermore,when x=0, cracks appeared in the Al0.8FeCoNiCrCux coating, and when x = 0.25, the cracks disappeared, and a light structure was observed in the interdendritic region. With the increase inx, the light structure changed from point distribution to continuous growth.The corrosion resistance of the alloy increased with the decrease in the quantity of Cu, the corrosion current density of Al0.8FeCoNiCrCu0.25 high entropy-alloy coating was estimated to be 7.94×10-8 A/cm2, and the form of corrosion was ascertained to bepitting.Additionally, the corrosion current density of Al0.8FeCoNiCrCuhigh entropy-alloy coating was ascertained to be 8.21×10-7 A/cm2. It also exhibited obvious intercrystalline corrosion,but was still superior to the substrate.This demonstrates that Al0.8FeCoNiCrCuxHEA(0.25≤x≤1) can be used as a coating to enhance the corrosion resistance of aluminum,and its high entropy effect can simultaneously inhibit the formation of inter-metallic compounds caused by the dilution of the substrate. This therefore addresses the problem of crack formation in coatings prepared with traditional materials.