Casein peptone is widely used in medicine and pharmacy, biological fermentation, animal feed, plant tissue culture, cosmetics, tobacco industry (flavoring), food hygiene inspection and other professional and all kinds of medium configuration, especially in the configuration of all kinds of semi comprehensive medium, this product is the main basic component, such as: semi comprehensive pertussis medium, semi comprehensive meningitis medium The semi comprehensive liquid medium, Staphylococcus aureus a protein medium, thioglycolate aseptic test medium, anaerobic medium and activated carbon agar medium were all based on acid hydrolyzed casein