Preparation method and application of cattle hide collagen peptide

The invention discloses a preparation method and application of cattle hide collagen peptide, and relates to the technical field of collagen peptide, the preparation method sequentially comprises the following steps: pretreatment, softening, enzymolysis, purification and decoloration, concentration and purification, and drying, the softening comprises the following steps: adding soaked cattle hide into purified water, adding EDTA, heating, heating, and filtering; adding purified water and EDTA (Ethylene Diamine Tetraacetic Acid) into the filtered solid, heating, and filtering; adding purified water and EDTA (Ethylene Diamine Tetraacetic Acid) into the filtered solid, heating, and filtering to obtain a solid product. By adopting a gradient softening method and treating at different temperatures, the cow leather is gradually softened, the effect is thorough, the subsequent enzymolysis reaction is facilitated, the enzymolysis degree is more uniform, the molecular weight distribution of most collagen peptides of