Abstract: 【Objective】 This project aims to study the effect of cadmium stress on the growth and enrichment characteristics of crops and seek more suitable plants for remediation of cadmium pollution. 【Methods】 In this study, hydroponic experiments were designed to determine the growth, cadmium absorption and accumulation of three plants under different concentrations of cadmium stress using Degao pakchoi, Xinluzao 42 cotton and wild solanum nigrum as test materials. 【Results】 (1) under cadmium stress, the plant height growth of cotton was significantly inhibited; with the increase of cadmium stress concentration, the biomass of solanum nigrum and cotton decreased significantly. (2) Under each individual treatment, the cadmium content in the underground part of cotton and pakchoi was higher than that in the aboveground part, and the root showed strong tolerance and cadmium absorption capacity; under the low concentration of cadmium (10 and 20 mg / kg), the cadmium content in the aboveground part of solanum nigrum was higher than that in the underground part, and at this time, the cadmium transfer capacity from root to stem and leaf was strong. (3) The cadmium accumulation ability of solanum nigrum was higher than that of pakchoi and cotton under high cadmium stress. 【Conclusion】 Under cadmium stress, the growth of pakchoi was not significantly inhibited. When the cadmium concentration was 5, 3.5 and 50 mg /kg respectively, the corresponding cadmium accumulation of pakchoi, cotton and solanum nigrum reached the maximum. The remediation ability of the three plants to cadmium pollution is as follows: solanum nigrum >pakchoi> cotton.