Elution method for heavy metals in soil

The invention belongs to the technical field of pollution treatment of heavy metals in soil and specifically discloses an elution method for the heavy metals in the soil. The elution method comprises the following steps: collecting polluted soil, removing impurities, grinding, filtering by a screen mesh, performing other types of pretreatment before elution, determining the pollution level of the soil after pretreatment of a polluted soil sample, mixing the polluted soil with an elution agent, then performing elution, centrifugating after elution, performing filtration treatment and the like. By utilizing the method disclosed by the invention, heavy metals, namely lead, cadmium, copper, zinc and other heavy metal elements in the soil can be simultaneously effectively removed, the using quantity of the elution agent is small, the influence degree of the elution agent on physical and chemical properties is reduced, the repair time is short, and the method is suitable for repairing the large-area moderate-severe heavy metal composite polluted soil.