Abstract: Four heavy metalsin surfacesediments from 25 sites in the western waters of Liaodong Bay in spring andautumn of 2009 were investigated.Concentrations of copper(Cu),lead(Pb),zinc(Zn)and cadmium(Cd)insurface sediments were measured with aflame atomic absorption spectrophotometer(FAS),and thesediments werealso analyzed with FAS for quality contol.Heavy metal pollution level were evaluated with the potential ecologicalrisk index and the geo-accumulation index.The results showed that the average concentrations of Cu,Pb,Zn andCr at different siteswere 8.0~32.1,4.3~56.9,20.0~102.6,0.12~0.34 mg/kg,respectively.The concen-trationsof Cu,Pb,Zn and Cd were higher than the background values of Bohai.Thepotential ecological risk of Cdwas in middle level and Cu,Pb and Zn were low.The potential ecological risk of heavy metals was in middle leveland was higher in nearshoreand estuary.The geo-accumulation indexof Cu and Zn were in zero level,and Pb andCd were low.Wesuggests that theaquaculturedensity be controlled in aquaculture area and humanactivities ofseafanming reduced.Correlation analysisbetween heavy metals and TOCconcentation in surface sediment showed thatthe elements ofCu,Pb and Zn probably had the same pollution source and TOC concentration had influenced onthe distribution of heavy metals in surface sediments in thewestem watersof Liaodong Bay.