This article studies the biomass and the content,absor bance,and enrichment of cadmium of the two tested plants of I mp atiens balsamica and Zinnia eleg ans Jacq under different conditio ns of cadmium concentration. Results show that by the tw o plants grow ing in soil have the different characteristics of cadmium absorbance and enrichment under the different conditions of cadmium concentration.The biomass increases with the increase in cadmium concentration and then decreases at a certain co ncentration.The enrichment ability of cadmium for I mp atiens balsamica is stronger than Zinnia elegans Jacq at the low concentration, but it converses in the high co ncentration.So,neither of the two tested plants reaches the standard of the hy peraccumulator.