Treatment device for underground water pollution plume

The utility model provides an underground water pollution plume treatment device, which comprises an extraction system, a wastewater treatment system and an injection system, the extraction system at least comprises an extraction well, the wastewater treatment system is arranged at the upper end of the extraction system, and the injection system is arranged on one side of the wastewater treatment system. A permeable reaction grid is arranged on one side of the first extraction well; according to the permeable reaction grid, the permeable reaction grid is designed into a plurality of semi-circular arcs with the same radius, so that the contact area between the pollution plume and the reaction grid is further increased, the treatment efficiency of the permeable reaction grid is improved, in addition, by means of a funnel-shaped water guide mode, an included angle of 45 degrees/135 degrees is formed between the barrier wall and the flowing direction of underground water, and the treatment efficiency of the perme