Gelatin is the product of moderate hydrolysis and thermal denaturation of collagen. The raw materials for the production of gelatin are mainly animal skins, bones, etc., which have homology with collagen and are pure natural substances rich in amino acids needed by the human body. Various properties of gelatin, such as gelatin, solid water, adhesiveness and solubility, as well as its chemical purity, make gelatin have a wide range of uses in the pharmaceutical industry, the most important of which are hard capsules, soft capsules, plasma substitutes and coating etc.