Bioavailability of heavy metals in soil depends on composition of the soil.Characterization of heavy metal distribution among different size fractions of the soil is needed for better understanding of the fate of heavy metals.This study investigated distribution of organic carbon,nutrients,and heavy metals among different size fractions in sandy soil.Results show that heavy metals,including Cd,Co,Cr,Cu,Ni,Pb,Zn and Mn,in the sandy soil were significantly enriched in particulate organic matter(POM),with Cu and Zn in particular,which were much higher in concentration than the others.It was more significant in 0 05~1 mm POM fraction than in >1 mm POM fractions.The enrichment in the POM fractions varied with soils,and was positively related to accumulation of the metals in the soils.The enrichment of heavy metals in the POM fractions was not completely due to decomposition of plant debris.The strong heavy metal adsorption capacity of POM in the soil might be an important machenism of heavy metal enrichment in POM fractions.