Taoxikeng tungsten deposit is one of the most important quartz-vein types of W-polymetallic deposit in southern Jiangxi Province, China. The authors obtained four related groups parameters by the means of “fluid inclusion assemblage”. The results 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.