Drosophila melanogaster were divided into control group and treatment groups and treatment groups were fed with medium containing extracts from green tea, counted the number of live and death every day until all the Drosophila melanogaster died and calculated the mean and maximum lifespan, furthermore, paired male and female Drosophila melanogaster of no mating and cultivated them, counted up the number of imago of Drosophila melanogaster when the offsprings appeared. The results showed that low concentration extracts from green tea（3 mg/mL-6 mg/mL） could lengthen the mean and maximum lifespan, promote the fecundity of Drosophila melanogaster remarkably, however, high concentration extracts from green tea（12 mg/mL） could shorten the mean and maximum life - span, diminish the fecundity of Drosophila melanogaster.%采用乙醚麻醉法,收集8h内羽化的果蝇成虫,雌雄分开培养,随机分为对照组和处理组（绿茶提取物质量浓度分别为3mg/mL,6mg/mL,12mg/mL）,每组饲喂相应的培养基,统计其寿命.另取未交配的雌雄果蝇成对放入培养基中,待出现子代成蝇时,统计成蝇数量,记录7d内成蝇羽化的数目,连续培养调查3代,观察绿茶提取物对果蝇繁殖力的影响.结果表明：绿茶提取物质量浓度为3mg/mL～6mg/mL时能显著延长果蝇平均寿命和最高寿命,并能显著提高果蝇繁殖力,质量浓度为12mg/mL时反而缩短果蝇寿命并降低果蝇繁殖力.
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