Abstract:Sediments were sampled from the depth 78.6m in the Zhangwei River Basin. Based on the analysis of OSL dating, grain size, mineral-magnetism measurement, to resore the change of palaeoenvironment Since 220ka.B.P, in this area. The evolution processes can be divided into 5 periods: 223.4~196.5ka B.P , the climate was warm and humid in this period;194.62~187.33ka B.P. , the climate begun turning into cold and dry In the period of 185.6~87.4ka B.P. , the climate was cold and dry, then gradually getting warm and humid; In the period of 84.5~12.6ka B.P. , the climate was cold and dry generally; 9.87~0.68 ka B.P., the climate got warm and wet in this period the climatic changes were from slightly cold and moderately dry→ warm and humid →warm and humid→slightly worm and moderately dry process. The results show that climate evolution has the characteristics of the global synchronization,but also affected by the characteristics of the region.