In order to study the effect of drying technics on catechins and its oxide.using four new drying ways: once microwave and twice microwave with hot wind ,once microwave and twice microwave with far infrared ray to dry Shuixian cake tea and traditional one.The results showed that the effect of drying technics on catechins and its oxide in Shuixian cake tea wasn’t obvious ;the content of catechins in Shuixian cake tea made by new technics was near to traditional one ,and the content of its oxide was lower ;the...