The invention discloses an aluminum-containing steel slow-release deoxidation method and application. The method comprises the procedures of revolving furnace smelting and refining. According to the revolving furnace smelting procedure, calcium carbide is added into a steel ladle before steel is discharged and in the steel discharging process. The invention further discloses application of the aluminum-containing steel slow-release deoxidation method to steelmaking. According to the aluminum-containing steel slow-release deoxidation method, the calcium carbide is added into the steel ladle before steel is discharged, and the calcium carbide is added in the steel discharging process along with steel flow; and weak reducibility of the calcium carbide is utilized, oxygen in molten steel is slowly released and removed in the whole steel discharging process, and oxygen activity of the molten steel is lowered so that the effects that the yield of aluminum products is increased, consumption of the aluminum products and materials such as calcium alloy wires is reduced, and the number of the occluded foreign substance, namely Al2O3, in the molten steel is reduced can be achieved. In the discharging process of a deoxidation product, namely CO, of the calcium carbide, molten steel stirring capacity is enhanced, and the effect that elements of the molten steel are homogenized is achieved. By means of the aluminum-containing steel slow-release deoxidation method and application, the production process is stable; production cost is lowered; and the aluminum-containing steel slow-release deoxidation method and application are suitable for smelting the aluminum-containing steel with the silicon content being less than or equal to 0.1% and the aluminum-containing steel with the carbon content being greater than or equal to 0.1%.