Contaminated land remediation method

The invention discloses a contaminated land remediation method. The method comprises the following steps: screening soil, cleaning solid substances, washing by selection, performing solid-liquid separation, performing soil detection, performing electric flocculation water treatment, precipitating and performing filter-press solid-liquid separation, wherein in the step of washing by selection, toxic soluble heavy metal ions, pesticides, plant catalytic agents and soluble organic matters in the soil are dissolved in water; and in the electric flocculation water treatment, heavy metal ions and organic matters in the water are converted into solid substances by virtue of electrochemical reaction and are flocculated from the water, so that the heavy metal ions and the organic matters comprising the pesticides, bacteria and viruses in a filter-press aqueous solution are removed. The method disclosed by the invention has the technical effects that the heavy metal ions in cleaning water are effectively removed under the condition that any chemical is not added, the physicochemical characteristics of the original soil are reduced, the full-automatic operation can be realized, the water treatment time is reduced, the remediation efficiency is improved, and the remediation cost is reduced.