Removing method for heavy metal Cr and/or Hg in soil

The invention relates to a removing method for heavy metal Cr and/or Hg in soil. Salix psammophila wood chips are taken and soaked in an acetate solution for 2-4 h firstly, the salix psammophila wood chips are taken out, the pH value of the salix psammophila wood chips is regulated to be neutral, and the salix psammophila wood chips are dried and sifted. Salix psammophila is planted on the soil polluted by the heavy metal Cr and/or Hg. The sifted salix psammophila wood chips are sprinkled in soil of an area at a horizontal distance of 20-40 cm with salix psammophila plant root systems. All plants of the salix psammophila are taken after the salix psammophila naturally grows to be mature, the salix psammophila is planted continuously till the contents of Cr and Hg in the soil reach the standard, and removing of the heavy metal Cr and/or Hg in the soil is completed. The salix psammophila is a tolerant species of the heavy metal Cr and/or Hg. In order to prevent the situation that the heavy metals are detained i