Tieguanyin is one of the top ten famous teas in China, which originated in Quanzhou, Fujian Province and belongs to oolong tea. According to the theory of traditional Chinese medicine, Tieguanyin is cold, sweet and sour, belonging to lung and spleen meridians. It has the effects of clearing away heat, reducing pathogenic fire, invigorating spleen, reducing fat, refreshing mind, promoting fluid production and diuresis, and can be used for treating sores on the mouth and tongue, dizziness, lethargy, hypomnesia, obesity and short and red urine. Tieguanyin contains tea polyphenols, alkaloids, vitamins, various amino acids and trace elements. Modern pharmacology shows that it has the following functions: 1. Can prevent and treat tumor. Second, the role of regulating blood sugar. Third, promote cerebral blood circulation and enhance memory. Fourth, the role of lowering blood pressure. Fifth, the role of anti-oxidation. Sixth, deodorize and prevent caries.