Heat treatment system for soil pollution

The invention relates to a heat treatment system for soil pollution, which is mainly characterized in that oil-containing soil is dried by a drying unit and then conveyed to a thermal desorption unit, so that oil contained in the soil is volatilized into a gaseous state through high-temperature heating in the thermal desorption unit and then is separated from the soil, and the effect of purifying the soil is achieved. Dust, water vapor, oil gas and the like caused in the drying and thermal desorption processes of the oily soil in the drying unit and the thermal desorption unit can be removed through the dust removal unit, and the water vapor and the oil gas are cooled into liquid through the heat exchange unit and then conveyed to the oil-water separation unit to be subjected to oil-water separation; in addition, organic gas contained in the oil gas can be heated and cracked into water and carbon dioxide through the tail gas treatment unit and then discharged into the environment, and waste heat generated by