Plant remediation device for heavy metal contaminated soil

The present invention discloses a phytoremediation device for heavy metal contaminated soil. The device comprises: an outer cylinder, wherein an inner cylinder is arranged in the outer cylinder, the inner cylinder is of a cylindrical structure with an opening in the upper end, air holes are formed in the cylinder wall and the bottom face of the inner cylinder, an isolation film is arranged in the cylinder wall of the inner cylinder, the repairing plants can more reasonably grow towards the underground polluted to-be-repaired area through the isolation film, so that the repairing efficiency is improved; a connecting plate which is movably arranged on the lower middle portion in the outer cylinder, wherein a plurality of partition plates are arranged on the upper portion of the connecting plate and divide the connecting plate into a plurality of fan-shaped areas, and a plurality of through holes used for downward growth of plant roots are formed in the connecting plate; a culture medium layer and an isolation a