Flavonoids are a kind of polyphenolic compounds, which widely existing in nature. Asflavonoids possess lots of biological activity, including antioxidant, inhibiting lipidperoxidation, prevention of cardiovascular disease and cancer, flavonoids are extensivelyresearched, developed and utilized in food and pharmaceutical industry. There are some activephenolic hydroxyls in flavonoid molecule, it may interact with digestive enzyme, such assalivary amylase, pancreatic amylase, and influence catalytic activity ...