Frozen ground change is a hot issue in the research regarding climate change,and soil temperature is an important parameter for research on frozen ground change.However,the change in soil temperature at deep layer has not be well understood on a centenary time-scale.This study investigates the change in soil temperature on the Tibetan Plateau (25° ~40.5°N,75° ~105°E) from 1901 to 2010 using the latest version of Community Land Model(CLM),CLM4.5,driven by the default forcing dataset of CRUNCEP in the model.The in situ observations from both 20 meteorological stations and 4 field borehole monitoring sites were collected to validate the simulated results.The results show that (1) the CLM can reproduce the observed changes in soil temperature (the correlation coefficient is 0.92 and the Nash-Sutcliffe efficiency is 0.82) ,and the results are superior to reanalysis data.(2) Soil temperature at 15m depth increased by 0.05 (0.27) ℃/decade on the Tibetan Plateau during 1901 ~2010(1979 ~2010).The increase in the soil temperature is larger in winter than summer.Increase in soil temperature decreased along with increasing depth and longitude and first increased and then slightly decreased along with increasing latitude.(3) Change in soil temperature on the Tibetan Plateau is mostly influenced by air temperature.Sensitivity of soil temperature at 1m (15m) depth to air temperature change is 0.79 (0.37) ℃/℃.Soil temperature at shallow layer is more sensitive than those at deep layer and permafrost temperature is more sensitive than seasonally frozen ground temperature.These results are useful for in-depth understanding the change in soil temperature on the Tibetan Plateau on a centenary time-scale.