Abstract: 【Conclusion】In order to provide people for an effective method of removing indoor air pollution of formaldehyde;【Method】13 species of indoor ornamentals were chosen in this experiment. Pot and soil were covered by plastic film to separate from the top plants, before they were put in the self-designed glass boxes. After the given concentrated formaldehyde was vented into the glass boxes for 15h and 24h, the concentration of formaldehyde and plant leaf area were measured. Thus the adsorption ability of 13 plants were ordered by comparing the decreasing of formaldehyde amount per unit of leaf area(mg/m2);【Results and Objective】The results showed that the adsorption ability of Syngonium podophillum etc. is much stronger than that of Aloe vera var.chinensis etc.