Lakes are spread all over the place in Tibet, and many ice lakes are located in alps or extra-high mountain areas.

Due to the natural, historical and social factors, very few studies on ice lake on highland are carried out with even less studies on disaster-relief during construction.

changes of lake ice following the climatic changes were stu-died and the Qinghai Lake in Plateau was taken as an example in this paper．Lake ice condi-tion， change and relation with air temperature were analysed based on the observed data ofmeteorological stations．The lower the temperature，the thicker the ice；lake ice changes lagsbehind temperature＇s.