Loess near Lanzhou in the late Pleistocene is very sensitive to climatic fluctuations. The Beiyuan terrace profile in Linxia City, of which the curve of susceptibility tallies with the trend of isotopic curves of Vostok 2083 m ice core in Antarctica, is 35 m thick. There are five layers of paleosols under Malan loess (L1). Upper three layers (S1-a,S1-b and S1-c) correspond to three warm stages in last interglaciation. Interstadial of Last Glacial (C stage in Antarctic ice core) was clearly recorded in the Beiyuan profile, in which three layers of paleosols and two of loess were formed. The lowest section of the profile belongs to penultimate glaciation, in which fossils of cold-drought-resistant mammal and mollusc have been discovered.