Production method of high-temperature resistant edible protein casing

The invention provides a production method of high-temperature resistant edible protein casing, comprising the following steps: (1) the animal inner leather is soaked in the alkaline proteinase solution of bacillus subtilis for a long time; (2) the leather after water washing and cutting is soaked in hydrochloric acid to become translucent and expanding; (3) the PH value of the material is adjusted to 2.5-3.5, then the material is cut up and pressed into tablets, and edible oil additives, soluble cellulose, water and hydrochloric acid are added into the tablets and mixed into micelles; (4) the micelles are filtrated, extruded and formed into a hollow tube shape; (5) the hollow tube is dried and cured; (6) the product is cooked at 85-95 DEG C under high humidity; and (7) the finished product can be obtained after folding and winding or shrinking. The product has the advantages of high strength, small shrinkage, uniform diameter and thickness, edible safety and high temperature resistance. The method of the inv