Based on the principle of sedimentology and the environmental behavior chaxacterishcs of heavy metals, Use the Index of Geoacumulation(Igeo) to evaluate heavy metal pollution in sediment at Benxi section of Taizi River. The results show tha heavy metal pollution in sediment at Benxi section of Tairi River are serious. The main pollutant of hcavy metals are copper, lead, zinc, cadmium and mercury.