The invention relates to a production technology for casting an aluminum foil, and belongs to the technical field of the production technology for casting the aluminum foil. The production technology is characterized in that: in a burdening process, the control range and control accuracy of a No.1235 alloy are as follows: the aluminum foil is cast by the following components in percentage by mass: 0.07 to 0.09 percent of Si, 0.500 to 0.600 percent of Fe, less than or equal to 0.008 percent of Cu, less than or equal to 0.01 percent of Mn, less than or equal to 0.05 percent of Mg, less than or equal to 0.03 percent of Zn and 0.005 to 0.012 percent of Ti, and the ratio of Fe to Si is controlled to be between 6 and 8; in a smelting process, 50 to 70 percent of electrolytic aluminum liquid is added with 30 to 50 percent of solid material, which is one of a re-melting aluminum ingot, an aluminum ingot tip-cut tailing and a hot-rolled thick-plate tip-cut tailing; and a bottom electromagnetic stirring system is arranged in a smelting furnace. After the temperature of a charging material surpasses 740 DEG C, the electromagnetic stirring system is started to run for 20 to 60 minutes. Through the production technology for casting the aluminum foil, the formation of crude compounds is greatly reduced; no saline refining agent is used in the smelting process of a No.1235 alloy melt; and when the thickness of the obtained No.1235 alloy double-zero aluminum foil is less than or equal to 6.3 mu m, the porosity is between 500/m2 and 600/m2, which is far lower than the porosity of the aluminum foil with the same thickness produced by the traditional casting production technology.