Natural-cold-energy-based ex-situ remediation system and method for polluted soil

The invention provides a natural-cold-energy-based ex-situ remediation system and method for polluted soil. The system comprises a material storage tank, wherein a partition is arranged at the inner lower part of the material storage tank for dividing the material storage tank into an upper soil tank and a lower water tank; round holes are evenly distributed in the partition, a geotechnical clothis arranged on the partition, a water inlet pipe and a water outlet pipe are arranged at the bottom of the water tank, and the water outlet pipe is connected to a leachate storage tank through a firstwater pump; and the water inlet pipe is connected to a water level cylinder, the water level cylinder is connected to the leachate storage tank through a second water pump, and a water level controller is arranged in the water level cylinder. According to the natural-cold-energy-based ex-situ remediation system and method for the polluted soil, the heavy metal polluted soil is remedied by utilizing the specific freeze-tha