Acid protease is a protease with high activity in acidic environment, which can break the protein peptide bond and decompose the macromolecular protein into polypeptide or amino acid. It is mainly produced by microorganism fermentation such as Aspergillus Niger and Aspergillus oryzae. Our products have significant advantages, selected high-quality microbial strains, through advanced fermentation process, to ensure high activity and stability of enzymes.