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This paper obtained a set of consecutive and long-recorded observational snow depth data from 51 observation stations by choosing,removing and interpolating original observation data over the Tibetan Plateau for 1961-2006.We used monthly precipitation and temperature data from 160 stations in China for 1951-2006,which was collected by the National Climate Center.Through calculating and analyzing the correlation coefficient,significance test,polynomial trend fitting,composite analysis and abrupt change test,this paper studied the interdecadal change of winter snow over the Tibetan Plateau and its relationship to summer precipitation and temperature in China,and to tropospheric atmospheric temperature.This paper also studied general circulation and East Asian summer monsoon under the background of global warming.