The invention relates to a method for preparing air dried sausage. The flavor formula of the air dried sausage comprises 10 to 20 g of amomum villosum, 5 to 15 g of angelica, 10 to 20 g of tsaoko amomum fruit, 5 to 15 g of braised pork, 10 to 20 g of cumin, 3 to 8 g of Chinese cinnamon, 10 to 20 g of aniseed, 5 to 15 g of clove, 5 to 15 g of areca, 5 to 15 g of cinnamon, 5 to 15 g of galangal, 3 to 8 g of dried ginger, 5 to 15 g of ishirai seed and 5 to 15 g of common achyranthes herb. The method comprises the following steps: pork is cut into blocks, mixed with the flavors, bloated and filled into a prepared intestine to prepare the air dried sausage, pure natural flavors are adopted to mix and season the air dried sausage, the prepared sausage is delicious, the original nutrient content of the meat can not be damaged, and the air dried sausage satisfies popular taste.