Heavy -metal waste water treatment device

The utility model discloses a heavy -metal waste water treatment device, including wastewater disposal basin, preliminary treatment pond and emission monitoring pond, wherein: the entry in preliminarytreatment pond and the export pipeline of wastewater disposal basin intercommunication, the export in preliminary treatment pond and the inlet line intercommunication that discharges the monitoring pond, set gradually first filtration adsorption column, second filtration adsorption column and third filtration adsorption column on the intercommunication route in preliminary treatment pond and emission monitoring pond, wherein, the filler material in the first filtration adsorption column is the quartz sand, and the filler material that the second filtered the adsorption column is the active carbon, is the filler material of third filtration adsorption column pressing 0.5 by graphite alkene and nanometer iron powder 2: 1 the mass ratio mix and the material, at least, seted up two exports on discharging the monitori