Abstract: The Han River, which is the longest tributary in the Yangtze River system, has an area of 17.4?10⁴ km² and originates from the south slope of the Qinling Mountains. The geochemical features of elements in sediment in the Han River are studied in a systematic way based on field investigation, sampling, analysis and measurement in laboratory. The content, distribution, variation, composition of minerals and the ralationship between element contents and the diameter of grains in sediment are thoroughly discussed. The results show that the elements of As, Pb, Cd are enriched and Cu, Ni, Co, Fe, Cr, Hg are decen-tralized in sediment. The contents of most elements in sediment in lakes are higher than those in rivers. There is a close correlation among Cu, Cd, Zn, Ni and also Co, Fe, Mn, Cr in sediment under the condition of a=0.001. The smaller the diame-ter of grains, the more the percentage of clay mineral and the less the percentage of clastic mineral. There is a better correla-tion between the content of most elements and the diameter of grains except Hg and Mn.