The invention discloses a method for processing supercritical expansion of cigarettes dried in the air, which comprises the following steps: a. tobacco leaves are loosened and humidified to increase the water ratio and the temperature of the tobacco leaves so that the tobacco leaves are loosened and the moisture content is even, materials are added to humidify the tobacco leaves; b. the tobacco leaves are cut into leaf threads; c. the leaf threads are stored; d. the leaf threads are put into a dipping mangle to be dipped for 20 to 60 seconds; e. the loosening, storage and feeding are performed; f. the leaf threads are expanded; g. the cooling, resurgence and perfuming processes are performed; and h. the foreign matters in the expanded leaf threads are removed. The method can apparently reduce the tar content, meet the style feature of cured tobacco products, and increase the dried tobacco filing value, thereby reducing the usage amount of finished products of tobacco shreds, and reducing the formulation cost; moreover, the method sufficiently adopts the function of expanded tobacco shreds on the specific incense and the form of smoke gas; and the formulation structure has relatively high adjustability, thereby effectively adjusting indexes such as the incense, concentration, taste, comfort and the form of smoke gas, and improving the formulation usability.