Abstract: Abstract: To analysis and research tea polyphenol .amino acid. Caffeine of 10 clone tea varieties for Shandong tea area in recent years,Research characteristics of mai biochemical components,,Analysis phenol/ammonia ratio; Zhongcha 108 values of free amino acid were at their highest, Average2.89%,Spring Tea average4.04%, Tea polyphenol content is moderate,Caffeine content is higher， Phenol/ammonia ratio minimum， Average5.85, Zhongcha 108 is the best breed of system of green tea，Highly recommended Zhongcha 108 in Shandong tea area. Key word: clone；tea variety；biochemical component