Based on the monitoring data of groundwater level and its quality in Karamay artificial carbon-dioxide-capture forest,the characteristics of groundwater dynamic change were analyzed. Meanwhile,the reasonable ecological water table of groundwater in the artificial carbon-dioxide-capture forest was discussed. Results show that buried groundwater depth in the artificial carbon-dioxide-capture forest was regularly distributed and it was reduced from 7.8 m in 2005 to 4.6 m in 2009. Groundwater mineralization changed from 22.67 g/L in 2005 to 5.35 g/L in 2009. Statistics of groundwater physicochemical properties indicated that the spatial variation of water-soluble salts in groundwater was obvious. According to relationship between the main forest vegetation growth conditions and buried groundwater depth,the reasonable ecological water table of groundwater in Karamay artificial carbon-dioxide-capture forest was 2.5～5.0 m.