Abstract: The formaldehyde absorption capacity of four plant species, i.e.,Taxus chinensis, Canna indica, Fatsia japonica and Jasminum sambac was studied with a sealed chamber of boilerplate by three formaldehyde concentrations. The results showed that all the four plant species had a pretty good absorption capacity to formaldehyde. By comparing the absorption rate of formaldehyde with 3 different concentrations in 12 hours, Taxus chinensis was the best, followed by Canna indica and Fatsia japonica, the formaldehyde absorption rate of Jasminum sambac was the weakest. The formaldehyde absorption amount per unit leaf area was increased along with the concentration increment. Under high formaldehyde concentration, the absorption amount per unit leaf area of Canna indica was the highest, indicating the formaldehyde absorption capacity of Canna indica was the strongest among the four plant species.