Abstract: Aluminum ash is one of the main pollutants produced in the smelting and production process of the aluminum industry. The secondary aluminum ash and calcium carbonate can be calcined to form a calcined slag with calcium aluminate as the main component. The use of calcium aluminate to dissolve out alumina is an effective method for the treatment of secondary aluminum ash. In this experiment, secondary aluminum ash and calcium carbonate were used as raw materials to study the calcification process of aluminum ash during the calcination of secondary aluminum ash and dissolution process of calcium aluminate. The test results showed that the optimal calcination conditions for calcification of aluminum ash were: mass ratio of calcium carbonate to aluminum ash 1 GA6FA 1, calcination temperature 1 000 ℃, calcination 90 min. Under this condition, calcium carbonate was completely decomposed and the activity of the product after forging is high, and the calcined material whose main component was Ca₁₂Al₁₄O₃₂F₂ can be obtained. Under the conditions of NaOH concentration 160 g/L, Na₂CO₃ concentration 66.67 g/L, dissolution temperature 85 ℃, dissolution time 45 min, the leaching rate of alumina was the largest, and the leaching rate was 79.22%.Studying economical and effective aluminum ash treatment methods can not only achieve efficient recycling of aluminum resources, but also have a profound impact on the sustainable development of society.