Zhijin Cave as a tourist cave with a poorly closed environment connects with the outside via cave tunnel and many shafts and fractures.Due to the change of atmospheric environment and tourist volume fluctuation in summer and autumn,the CO_2concentration and humidity in the cave are usually higher than that of spring and winter.The correlation statistical analysis of the cave CO_2concentration,air pressure,air temperature and humidity with data obtained in January 2015to January 2016was performed.Temperature and CO_2concentration showed a negative correlation,and the correlation coefficients in summer and autumn were-0.72876and-0.65616,respectively.However,in spring and winter the temperature and CO_2concentration was positively correlated,and the correlation coefficients of the two quarter were 0.85452and 0.93846, respectively.Except for the relationship between humidity and temperature,the fitting degrees between the other environmental factors on the basis of SINE function fitting are comparatively high,which fall in the range of 0.6-0.8.According to the analytical results,the relationship between climatic and environmental factors is believed to be heavily impacted by the seasonal tunnel air exchange,atmospheric precipitation,cave water,overlying soil CO_2,tourists who visit the cave,cave lightening facilities and etc.