Abstract: Samples of dustfall were collected from July 2004 to July 2005 every three month.Heavy metals were analysed using ICP-AES and the composition of Pb isotopes analysed using ICP-MS.Annual flux of atmospheric deposition was calculated and compared with other sites,it is found that dustfalls to Quanzhou Bay have been contaminated by heavy metals,but compared with other well developed sites in China,Quanzhou Bay is still in a relatively better condition.The composition of Pb isotope indicates that the pollution of Pb is mainly caused by anthropogenic sources.The enrichment factors of different elements show that Cd,Pb,Zn,Cr,Cu and Ni are seriously impacted by human activity.Activity of production,combustion of fossil fuel,and weathering processes of contaminated soil are the main sources of heavy metal in dustfall.