Abstract: Based on the monitoring data of surface sediments of Zhoushan region in Aug.2016, the particle size of sediments, the content of heavy metals and its influencing factors were analyzed, the degree of heavy metal pollution was evaluated, in order to provide geochemical data for the study of sedimentary environment in Zhoushan region.The results showed that the particle size of surface sediments in the study area was mainly composed of silt and clay.The type of sediment was dominated by clay powder and silvery clay.The order of average concentration of heavy metals was Zn>Cr>Cu>Pb>Cd>Hg.The order of fluctuations in spatial distribution was Pb>Cu>Cd>Zn>Cr>Hg.Cu, Cd, Pb, Cr and Zn had similar pollution sources.Organic carbon was an important control factor in the distribution of heavy metals.The order of the level of heavy metals pollution was Hg>Cd>Cu>Zn>Pb>Cr, heavy metals pollution incline to moderate level of pollution.