This study deals with the relationship between cave air environment characterization and the leading factors,which is an important issue in change of speleothems and in cave climate change estimations. The study focused on a twoyear monitoring and data analysis of main cave air environment in Dafeng Cave, a tributary cave of Shuanghe Cave in Suiyang County, Guizhou Province, during 2015-2017, including 14 cave sites and 2 adjacent karst soils. Calculations of this monitoring data indicated that carbon dioxide concentration, air temperature, and humidity in the main passage varies seasonally. From the opening to the cave, the variation of CO_2 concentration gradually increased, and the change range of temperature and relative humidity gradually stabilized. Affecting not only by the external climatic conditions, but also by the overlying soils,different cave patterns and varied ventilation patterns increase the spatial complexity of cave climate change. Tourism activities and breathing, anthropogenic activity also affect the instantaneous level of cave air environment.