The invention discloses a method for improving the corrosion resistance of a cathode aluminum plate for zinc electrolysis, which comprises the steps of rolling with rolling oil of particular composition formula and treatment after rolling the aluminum plate. The composition formula of the rolling oil consists of basic oil and additives, wherein the basic oil is of lubricant with the boiling range of 225.7 to 243.3 DEG C, flash point of the lubricant is 95 DEG C, the viscosity (at the temperature of 40 DEG C) is 1.9 to 2.0 mm2/s, the additives are of methyl alkanes and dodecyl phosphate, the composition ratio of the basic oil, the methyl alkanes and dodecyl phosphate is 100: 3: 1 to 100: 8:1, the aluminum plate after being rolled is processed by sodium silicate solution with the concentration of 0.5 to 2 percent at the temperature of 70 to 0 DEG C for 2 to 10 minutes, and the service life can be improved by more than three times.