于春茶萌发前用茶树催发素喷施茶树树冠，分析喷施后茶树新梢化学成分含量和组成的变化。结果表明，供试的３个茶树品种喷施茶树催发素后，鲜叶化学成分向有利于绿茶品质的方向变化。氨基酸提高１６．８％，维生素Ｃ提高２０．４％，咖啡碱降低１７．４％，茶多酚降低９．４６％，酚氨比下降１９．６％，儿茶素品质指数提高１４．５％。差异均达到显著水平。鲜叶的内质评分提高５．８％ Before the germination of tea, tea tree canopy was sprayed with the active ingredient of tea tree and the changes of the chemical composition and composition of the tea shoot after spraying were analyzed. The results showed that the chemical constituents of fresh leaves were changed to favor the quality of green tea after sprayed three elements of tea tree. Amino acids increased 16.8%, vitamin C increased 20.4%, caffeine decreased 17.4%, tea polyphenols reduced 9.46%, phenol ammonia ratio decreased 19.6%, catechin quality index increased 14.5% . Differences reached a significant level. Fresh leaves increased the endoplasmic reticulum score by 5.8%