The Hongzuisi Section in Lanzhou area is used to infer the paleoclimate since the late glacial epoch. Through combined analysis of organic carbon isotope and CaCO3 content, paleoenvironment evolution of Hongzuisi Section since the late glacial epoch is discussed. There were changes in both dry-moist and warm-cold. Especially the climate changes can be compared with synchronous sections of other areas, which provides useful information for our future forecast. The Combined Zone of Lanzhou area is used to infer the paleoclimate since the late glacial epoch. Especially the climate changes can be compared with synchronous sections of other areas, which provides useful information for our future forecast.