Abstract: Taoxikeng tungsten deposit is one of the most important quartz-vein type of W-polymetallic deposit in Southern Jiangxi Province,China.Four main types of fluid inclusions: single aqueous phase H2O-NaCl(Ⅰa type),rich liquid L+V two-phase H2O-NaCl(Ⅰb type),two phase H2O-NaCl-CO2(Ⅱa type) and three phase H2O-NaCl-CO2(Ⅱb type) have been recognized in all samples from the wolframite-bearing quartz and topaz of the major mineralizing stage.The Ⅰb type homogenization temperatures are widely from 80℃ to 370℃ with multi-peaks distribution,mainly in 140 ~ 190℃,200 ~ 250℃ and 340~360℃.Ore-forming fluids has the characteristic of low salinity,generally 8 w(NaCleq) %.We obtained four related groups parameters by the means of "fluid inclusion assemblage".The results are indicated that different fluid inclusions parameters are generally belongs to the same range in the same fluid inclusion assemblage,such as salinities,homogenization temperatures and densities,while those parameters are quite different in different fluid inclusion assemblages,showing trapped fluids are diversity in different fluid inclusion assemblages.There are three ranges of the four fluid inclusion assemblages homogenization temperatures: 329 ~ 355 ℃,214 ~ 240 ℃ and 141 ~ 189 ℃,which can be adjusted to trapping temperature: 400 ~ 425 ℃,275 ~ 300 ℃ and 210 ~ 260 ℃ by pressure.All of these presented that there are existing at least three hydrothermal flow in Taoxikeng tungsten deposit,of which the first two periods are ore-forming hydrothermal activity,and the third period is a hydrothermal activity after diagenesis.According to CO2 homogenization temperatures and final homogenization temperatures of type Ⅱ fluid inclusions,this paper got trapping pressures 67.3 ~ 97.8 Mpa of ore-forming fluid,an average of 74.8 Mpa,converted into ore-forming depth of 2.59 ~ 3.77 km by lithostatic pressure,an average of 2.88 km.