By using dekade sensible heat flux(SHF) da ta set from NCEP/NCAR reanalysis project from 1979 to 1995,investigated are the fea tures of seasonal/interannual variations of SHF itself and of SHF anomaly in win ter/summer over the Plateau and its vicinities.Results show that SHF experiences a remarkable seasonal evolution,which can be classified into winter pattern(from late Oct.to early Mar.) and summer pattern(from middle Mar.to middle Oct.),w ith the seasonality being the most significant over northern desert and southern Mt.Qomolangma.The anomaly of SHF occurs mostly during the 3rd to 15th dekade or the 26th to 36th dekade.The space pattern of the interannual variations of win ter(summer) SHF is characterized by the contrast between east of 85°E and west of 85°E(northern and southern Plateau),with a decreas ing(increasing) cooling(heating) trend in the last 13 years.