The surface of the aluminum alloy tends to get oxidized to form an oxide film with porosity structure and poor corrosion resistance. The surface of the 2A96 aluminum alloy was treated by anodizing. Different anodized films were prepared on the surface of 2A96 aluminum alloy by changing the oxidation voltage in the anodizing experiment. The surface morphology of each anodized film was observed by the metallographic microscope, while the thickness of the anodized film was measured by a thickness gauge, and the microhardness tester was used for measuring the hardness, with spotting experiment for obtaining its drip time, and electrochemical workstation for obtaining its polarization curve and AC impedance spectrum, and then its corrosion resistance was studied. The results showed that the thickness, hardness and drip time of the anodized film increased gradually with the increase of voltage within the measured voltage range (8~16 V), and the corrosion resistance was also enhanced. After the surface anodization of 2A96 aluminum alloy, its performance was significantly improved.