The invention provides an aluminum alloy anode oxide film hole sealing agent and a hole sealing method thereof. The aluminum alloy anode oxide film hole sealing agent is prepared from the components with the following concentration: 5-10 g/L of nickelous acetate, 2-8 g/L of a PH stabilizer, 0.5-5 g/L of a corrosion inhibitor, 0.1-5 g/L of a surface active agent, 10-50 mg/L of an antisludging agent, 0.2-0.8 g/L of a complexing agent, and the balance of deionized water. The aluminum alloy anode oxide film hole sealing agent has the beneficial effects that 1, the hole sealing effect is great, escaped dye is less, the color difference change is small, and the aluminum alloy anode oxide film hole sealing agent can be used for dyeing anode oxide film sealing holes; 2, a hole sealing agent solution is stable, the impurity tolerance ability is strong, it is only needed that the content of the nickelous acetate is analyzed everyday, medicinal liquid is added according to the proportion, and thePH value of the solution is monitored periodically; 3, the anode oxide film is strong is corrosion resistance after being subjected to hole sealing, and a neutral salt spray test is conducted for 72hours according to the ASTM B-117 standard, and corrosion is avoided on the surface; and 4, the hole sealing effect meets the requirement of GB14952.1-94, and hole sealing ash is avoided on the surface of the oxide film.