Abstract: The present paper deals with proturan diversi by analysis of 3835 specimens of 52 species from 87 soil samples which were collected from Yunnan province in 1992-1993.he Relative richness,Berger-Parkers index,Simpsonis index,Shannons index,and Evenness were estimated,and all the data were summarized in table 4.At the end of this paper,the results of the above analysis were compared with the data of Collembola from northern part of Thailand.The results of the present study may be summarized into three main points:1.Yunnan Province is the richest area for proturan diversity in China,even in the world.2.Baculentulus tienmushanensis is the dominant species in this area.3.Most proturan species in this area are in low-abundance.