Abstract: The purpose of the study is to investiste the impact of air temperature raising and soil drought tendency caused by at mospheric CO2 concentration enrichment on plant species.The impacts of higher CO2 concen tration and soil water stress on Pinus Korai ensis Sieb.Et.Zucc and Picea Asperata Mast.were studied by using artificial climatic chambers.The results showed that CO2 concent ration enrichment increased the increasing rate of growth value of Pinus Koraiensis Sieb.Et.Zucc and Picea Asperata Mast.,but the soil water stress decreased it.The positive effects of CO2 concentration enrichment were smaler than that the negative effects of soil water stress.As compared with ambient CO2 concentration and suit able soil water,the plant height,basal diameter and total branch length of Pinus Koraiensis Sieb.Et.Zucc in CO2 enrichment and slight soil drought decreased by 0.79%,2.32% and 3.53%,respectively,the Picea Asperata Mast decreased by 2.14%,0.04% and 2.72%.The plant height,basal diameter and total branch length of Pinus Koraiensis Sieb.Et.Zucc in CO2 enrichment and grave soil drought decreased by 2.81%,2.80% and 4.97%,respectively,the Picea Asperata Mast.decreased by 3.49%,0.99% and 4.15%.Therefore,at mospheric CO2 enrichment is favor to nursery stock growth,but the netincrement rate of nursery stock growth value in soil water stress is stil decreasing.CO2 concent ration enrichment increased the leaf water potential,but the soil water stress decreased it.It is explained the impact machanism of CO2 concentration changing and soil water st ress on tree species from plant physiology.Under slight soil drought case,CO2 concentration enrichment increased the leaf water potential,but together with soil drought aggravated,leaf water potential of tree species decreased gradually.In the status of CO2 enrichment and slight soil water stress,the leaf water potential of Pinus Koraiensis Sieb.Et.Zucc and Picea A sperata Mast.increased by 0.41% and 0.44%,respectively.In the status of CO2 enrichment and grave soil water stress,the leaf water potential of Pinus Koraiensis Sieb.Et.Zucc and Picea Asperata Mast.increased by 1.13% and 1.75%,respectively.Simult aneously,it can be seen from the experimental results,the significant impacts of at mospheric CO2 concent ration and soil moisture change on nursery stocks do exist,but the impacts are much smaller compare to the crops and pastures.