The investigation on seasonal dynamics of soil oribatid mites community at genus level in Fanjing Mountain National Nature Reserve in Guizhou was carried out in different month of 2001-2002. The abundance of soil oribatid mites in different season from high to low is: spring>winter>autumn>summer, the diversity is: autumn>summer>winter>spring. The community’s compositions of soil oribatid mites are different in the four seasons. Oppiella, Suctobelbella and Xylobates are the significant dominant fauna in each season in Fanjing Mountain. The soil oribatid mites mainly distribute in the surface layer and migrate from surface to deeper layer from summer to winter.