Fermentation and enzymolysis preparation method and application of peony seed meal polypeptide

The invention discloses a fermentation and enzymolysis preparation method and application of peony seed meal polypeptide, and relates to the technical field of enzyme engineering. The fermentation and enzymolysis preparation method of the peony seed meal polypeptide comprises the following steps: mixing peony seed meal with water, distilling and removing oil to obtain peony seed meal residues and peony seed meal residue liquid; fermenting the peony seed meal residues to obtain a peony seed meal protein extract; mixing the peony seed meal protein extract with protease, performing enzymolysis twice, and performing high-temperature enzyme deactivation to obtain peony seed meal polypeptide enzymatic hydrolysate; and filtering the peony seed meal polypeptide enzymatic hydrolysate through a membrane separation system to obtain filtrate, mixing the filtrate with activated carbon, performing adsorption decoloration treatment, removing the activated carbon after decoloration, and drying the filtrate to obtain the peon