Snow cover reflects most of the solar radiation due to its very high reflectivity;at the same time, snow cover depresses longwave radiation due to its low conductivity.As a consequence,the accumulation and depletion processes of seasonal snow cover change the radiation energy balance on top of the atmosphere, then feedback to the climate system.ERA-interim reanalysis data,MODIS cloud-free snow products were used to simulate the energy balance on top of the atmosphere in Tibetan Plateau between 2001~2010 using modified partial radiative perturbation method.Results showed that more than 99.5% of the study area has a negative radiation balance,which indicates a positive radiative forcing to the climate system.The annual snow radiative forcing of the study area is 3.97W m~(-2) on average between 2001~2010.There is little difference in the annual snow radiative forcing while big difference lies inside of the study area;the spatial distribution of radiative forcing has a very high correlation with annual fraction of snow cover.Under most circumstances,shortwave radiative forcing is the determinant factor of snow radiative forcing.At last, snow feedback is estimated to be 9.35W·m~(-2)℃~(-1).