Distribution of heavy metals (Cd,Cr,Cu,Pb and Zn) in sediments of Lake Dianchi in the estuary of the Panlongjiang River was studied.Pollution degree of heavy metals was also evaluated based on the geological accumulation index (I-geo).The results showed that the concentration of heavy metals (except Pb) decreased with the increasing sampling depth.In terms of concentration,the heavy metals followed a decreasing order of Zn > Cu > Cr≈Pb > Cd in the sediments.Relativities were found insignificant between heavy metals in the surface sediments (0~5 cm),and were,however,significant in the layers 5~10 cm and 10~20 cm in depth.Relationship between most of the heavy metals and organic matter weren't significant in the layers,0~5 cm and 5~10 cm in depth,but significant in the layer 10~20 cm in depth.Relationship between the heavy metals and sediments particles size (clay fraction,silt fraction and sand fracton) weren't significant in the layer 0~5 cm in depth.Concentrations of the heavy metals (except Pb) decreased with the increasing distance from the estuary of the Panlongjiang River.The heavy metals were evaluated based on I-geo index,indicating moderate to strong contamination of Cu,Pb and Zn,extremely strong contamination of Cd,and little contamination to moderate contamination of Cr,which means pollution degrees of the heavy metals followed the sequence of Cd > Zn > Cu=Pb > Cr.