The vertical structure of the low-frequency variations of the temperature fields from the troposphere to the lower stratosphere over the eastern part of the Qinghai-Xizang Plateau is studied in this paper using the single correlation method. The seasonal variation features of the height and intensity of maximum negative correlation layer are pointed out,and are compared with circumstances at Geermu in the northern part of the plateau and in the northern region of China (120 °E,30～50 °N). The physical reasons for the low-frequency vertical structure and seasonal variations of the temperature fields over the Qinghai-Xizang plateau is discussed in terms of seasonal changes of the tropopause, atmospheric temperature stratification and vertical profiles of kinetic energy over the plateau. At last, it is investigated and pointed out that the Autumn(October-November )atmospheric thermal structure over the eastern part of the plateau and the intensity of two Walker circulation cells over the equatorial Indian Ocean to the equatorial Pacific ocean are closely related with the SSTA(0～10 °S,180～90 °W )from October to January.