The use of gold nanoelectrode arrays for heavy metal tracing was investigated using square wave anodic stripping voltammetry.The nanoelectrode arrays were fabricated using polycarbonate nanoporous membranes as templates,with a sputtered-thin gold layer coated on one side.In the nanoelectrode array,nanowells with large inter spacing were arranged in array,which give rise to a greater current density and smaller background current than the bulk gold electrode.The results showed that the gold nanoelectrode arrays had high signal to heavy metal such as lead and cadmium.