Abstract: The effects of CO2 concentration on photosynthesis, activity of photosynthetic enzyme, growth and development of Guzmania 'Cherry' were studied in greenhouse. Meanwhile, recovery situations in ambient CO2 concentration were studied following the end of elevated CO2 concentration treatment. The results as follows, the net photosynthetic rate and water use efficiency of CO2 concentration enrichment were higher than that of ambient CO2 concentration. But stoma conductance and transpiration rate of treatment were lower than ck. The plant height and leaf area were also increased. The contents of soluble sugar and starch were accumulated. The contents of total chlorophyll, chlorophyll a and chlorophyll b were decreased, but no obviously change in rate of chlorophyll a/b. Activity of glycolate oxidase was substantially declined, But Rubisco activity was promoted during treatment of 30 days. Rubisco Activities of treatment were lower than CK after treated 90 days. Flowering of Guzmania 'Cherry' were also promoted. Index of Photosynthesis, activity of photosynthetic enzyme, and the contents of soluble sugar and starch were returned to the level of control after exposure to elevated CO2 for 150 days and switched from treatment conditions to ambient CO2 for 30 days.