Leaf traits study is a quick and simple method to explore the adaptive strategies and mechanism of plants in different groups, it also be an important information of plant growing and adaptation processions to the environmental condition. According to this case, there are only a few research reports about tea leaf traits and also 30 types of tea species in Yunnan province were already studied. This research was focused on leaf measurement methodologies; such as: the leaf area, leaf fresh weight, leaf dry weight, leaf thickness, chlorophyll content, leaf serrated number, lateral pulse number, leaf length, leaf width. The studying results are as following: (1) Variation range of factors: AR(8.58-48.72cm₂)、FW(0.233-1.656g)、DW(0.090-0.605g)、CClC(60.89-163.49CCI)、TH(0.17-0.34mm)、SLA(60.69-133.06cm₂.g_-1)、DMC(0.350-0.557g.g_-1), Yunnan’s tea leave chlorophyll content averaging was 110.81CCI, and the highest value was 163.49CCI as high, which was significantly higher than other tea plants in other regions.(2) Correlation results of leaf traits factors showed that: There was a significant negative correlation between SLA and DMC(p＜0.01); There were significantly negative relationships between TH,DW,CClC and SLA(p＜0.01); There was a significant positive correlation between LL,FW,DW,WD,CClC and TH(p＜0.01); There was a significant positive correlation between AR,LL ,WD,TH and FW,DW(p＜0.01); There was a significant positive correlation between TH and CClC(p＜0.01);(3) 30 Yunnan teas species were divided into large, medium and small leaf traits by leaf area measurement, this is different from previous studies;(4) Leaf traits variation range is 9.26-40.27%,the order isFW＞Dry weight of dead leaves＞DW＞AR＞ LL ＞CClC＞MX WD＞AV WD＞ SLA＞TH＞DMC, The leaf traits of 30 tea species in Yunnan were less variable, most of them have low coefficient of variation(9.26-40.27%), the variation coefficients of SLA,DMC were 16.18% and 9.26 respectively.