Plant repairing method for soil polluted by heavy metal cadmium

The invention discloses a method for recovering plants in soil subjected to heavy metal cadmium pollution, and belongs to the field of soil pollution control in environmental protection. The method comprises the following steps: (A) periodically measuring the content of cadmium in the soil, and grafting willow; and (B) after the willow is grafted for two months, adding chemical enhancer consisting of ethyl lactate and ethylene diamine tetraacetic aid into the soil. In the step A, the willow is selected from Jiangsu willow clone J1011, and the planting density of the willow is between 4 and 6 strains every square meter when the content of the cadmium in the soil is 6 milligrams in every kilogram of soil. The method can overcome the defects of short and small strains, low growth rate, small amount of ground biology, and the like during recovery of the plants polluted by the heavy metal cadmium, improve recovery efficiency by singly using organic ligand as a chelate extracting agent to recover the heavy metals, has lower recovery cost, and reduces the use level of synthetic chelating agent such as EDTA by using the ethyl lactate so as to reduce environmental risk for recovering the heavy metal cadmium in the soil by extracting the plants.