Lake survey shows that Hanas Lake, with maximun water depth of 188. 5m, mean water depth of 120.1m and excellent fresh water capacity of 5.378km³, is one of very prominent lakes in China. The cross section of the lake bottom shows an unusual chest-like form and the lake faults are still in intensive action now. The grain size distribution is controlled chiefly by longitudinal transportation, and influnced by traverse transportation in the local area with quite low concentration of the most nutrient elements in the sediments. Minerals and chemical elements of the sediments are obviously under the control of sedimentary environments, with quite low concentration of the most elements in the sediments. Its sedimentary rate is measured 0.52mm/a by ²¹⁰Pb,but insufficient to compensate the lake faulting,as a result,the lake depth will get increased even more.