Abstract: There are broad deposits of aeolien sand in the Gonghe Basin of Qinghai province, It is a sand region which is the southern most of latitude as well as the highest altitude of desert zone in China.There have mainly two dune types, i e. crescent dunes and longitudinal dunes. The grain size and heavy minerals analysis indi cate that the source of sands is from the alluviall acustrine deposits of early-middle Pleistocene(Ql-2), It is widely distributed and has megathickness. In this basin, the sand dunes are formed of two different ages.From determination of Radiocaobon dating:They are formed in two dry periods of the late Pleistocene and Holocene, which are relative to Late-wiirm Glacial period and third stages of the Neoglaciation ageft