The invention discloses a processing technique of hairtail textured protein. The processing technique comprises the following steps of preparing raw materials, performing degreasing, performing preparation before feeding, performing extrusion and cooking, and performing baking. The processing technique has the beneficial effects that the hairtail textured protein is high in protein content, low in fat content and high in nutrient value, and the texture of the hairtail textured protein is similar to that of natural animal muscle fibers and has a multi-hole puffed texture structure; the hairtail textured protein is good in water solubility, free from fishy smell and bitter smell, high in dietary value and broad in application range, has biting sense and has broad market prospects; the cost of raw materials is low, the waste of hairtail scraps is avoided, the utilization rate of the hairtails is increased, and the added value of hairtail type products is increased, and the processing technique is simple, the production efficiency is high, and the processing technique is convenient to popularize and apply.