Plant remediation device for heavy metal contaminated soil

The invention relates to the technical field of environmental governance, in particular to a heavy metal contaminated soil phytoremediation device which comprises a frame body and a plurality of plant bodies used for remediating heavy metal contaminated soil, the frame body is provided with a purification mechanism used for purifying contaminated gas, and the frame body is provided with a conveying mechanism used for conveying a nutrient solution. An injection mechanism used for injecting a nutrient solution is arranged on the frame body, the injection mechanism comprises a bearing plate which is connected into the frame body in a sliding mode, a plurality of injection parts are installed on the bearing plate, needles are fixedly connected to the injection parts, and a driving assembly used for driving the needles to be inserted into a plant body is arranged on the frame body. By arranging the injection mechanism, the bearing plate is driven to move, the injection part moves along with the bearing plate, a ne