Four exposed sections at Zhanlongjing,Baidonghe,Liuniu and Nazhou were investigated in the Baise basin,Guangxi.Paleoclimatic information was gained based on the sedimentary characteristics and criteria,clay mineral assemblage types and CaCO3 index recorded by these sections.Then according to the paleoclimatic information,combined with the ESR dating data,the time sequence for the sediments of the late Paleocene Liuniu Formation to late Eocene Baigang Formation(63.1~33.7 Ma BP)was determined,which indicates that in the study area there occurred six paleoclimatic evolution stages,i.e.the semi-arid and arid,humid(slightly cool),warm-humid,humid(slightly hot),warm-humid and slightly arid stages,from late Paleocene to late Eocene.