The invention discloses a processing method of air-dried fish and belongs to the field of processing of the air-dried fish. The method comprises steps as follows: site selection, preparation of appliances, preparation of devil spices, equipment selection, earlier-stage processing of equipment, fish selection, fish cutting, airing, salting, pressing, fish turning, fish discharging, fish drying in the sun, fish collection, sterilization, packaging, fermentation, leak detection and refrigeration. The processing of the air-dried fish is not limited by seasons and temperatures, the air-dried fish can be produced in winter and summer as usual, and the flavor keeps unchanged completely; the ingredients are all-natural components, no harmful components are added, and the nutritive value is high; and the air-dried fish prepared with the method has moderate degree of saltiness and low shrinkage, and during eating, the air-dried fish is not required to be soaked in water for desalting, needs no addition of any seasonings and can be eaten only by steaming. The air-dried fish not only keeps fresh taste of fresh fish, but also has chewiness of the air-dried fish, and although no preservatives are added, the air-dried fish has longer quality guarantee period and low preservation cost.