Tea Polyphenol(TP) is new national high-new technical product extracted from green tea.It mainly contains catechins and other compponents such as vitamins and microelements. It shows not only an excellent antioxidative effect on fat and oil containing foods, but also showed germicidal activity,anti-senescent acitivity,preventing food from fading, improving the stability of vitamins and inhibiting the formation of carcinogen nitrite. Moreover, TP has such a good effect on eliminationg free radicals that it can prevent and cure cardiovascular diseases induced by the excess of free radical. It is also an agent that can distinctively strengthen the capacity of immunity.