Abstract: Based on historical data and the survey caried in August inShacheng Port in 2013,the distributionsandsources of heavy metal in seawater,sediment and shellish were discussed and analyzed.Results showed that theconcentration ofdissolved Cu,Cd,Hgand As in surface layer of seawater were relatively low except that Pb excee-ded the sea waterqualitystandard(Class 1)in most areas.The concentration of Pb,Cd,Hg and As in marinesediments were relatively low except that Cu exceded the marine sediment quality(Class1)in Bachimen entanceand Luochun inlet.Assessment used index ofgeo-accumulation showed that different partsof sea areas were slightcontaminated by Cu,Hg and As.Twoshellishes retrieved from intertidal zone near Diantou Town were contamina-ted variously.Thecontamination was low in Sinomoracula constzcta but high in Ostrea plicatula,which the pollu-tion index of Cu and Cd exceeded 10.Fujian-Zhejiang coastal curent was the main source of most heavy metals toShacheng Port.However,sewage discharged from Bailin stone processing enterprises resulted Cu pollution atBachimen shoal in the upper reach of the port.Moreover,sewage discharged from Luochun shipyard was probablythe source of Cu,Pb and Cd pollutions in Luochun inlet.