Under the influences of climate change and human activities,the desertification in the Tibetan Plateau is taking on an increasing trend.The sand accumulation resulted from desertification could alter the radiation balance of ground surface,destroy the stable equilibrium state of permafrost,and could even affect the roadbed stability of Qinghai-Tibet Railway.Therefore,to study the influence of desertification on permafrost is significant to combat desertification,protect permafrost and construct road in the Tibetan Plateau. At present,some progresses in radiation balance of the Tibetan Plateau have been achieved by previous scholars and more attentions have been paid to the influences of sand accumulation on permafrost temperature. However,due to the shortage of observational data with continuity,synchronism and comparability, the study on radiation balance in sand surface ground is still weak,and the research findings about the influences of sand accumulation on permafrost temperature are not agree with each other.In addition,it is urgent to conduct the study on the influences of sand accumulation on roadbed.In order to carry out further research on this problem in future,some suggestions were put forward in this paper such as enhancing in-situ observation,conducting indoor experiments and carrying out numerical simulation.