To explore the variation characteristics of DIC-delta~(13)C in the drip water and pool water in Furong cave, Chongqing,their influencing factors,and their impact on climate,the cave had been monitored from May 2013 to May 2014.The results showed that the CO_2 concentration for both the soil air and cave air was high in summer and low in winter,which displayed significantly seasonal variations.They were affected by the combined effects of temperature and precipitation.The average DIC-delta~(13) C value of the drip waters from five monitoring sites was-8.98,while the average DIC-delta~(13) C value of the pool waters from two monitoring sites was-6.98,showing that the DIC-delta~(13)C value of pool water was 2heavier than that of the drip water. Corresponding to the arid climate in July 2013,the DIC-delta~(13) C of cave water became heavier in October, while the light DIC-delta~(13) C values indicated the delayed response to the humid climate.The DIC-delta~(13) C of cave water showed a significant lag period to respond the climate change.The DIC-delta~(13) C was dominantly affected by the soil CO_2,also by bedrock dissolution,prior calcite precipitation and the opening degree of vadose zone.Our study demonstrates that on short time scales,the variations of DIC-delta~(13) C of the drip water in Furong cave respond to the changes of local precipitation and the humidity conditions overlying the cave.