The temperature and precipitation data at four representative stations in Rikaze of Tibet from 1956 to 1997 was analysed.Rikaze region was divided into three climatic areas and the variation characters of temperature and precipitation in every area during forty years were studied.The results show that the climate gets warmer gradually in Rikaze in forty years,and it was obviously warm in the 1980′s.The rising temperature in the western Rikaze was more than that of the valley along the Yaluzangbu river and the southern border area.The anomalous warm may be occured in both winter and summer and the frequence is rising in the recently years,but the anomalous cold is seldom.The decreasing trend of precipitation appears in the west and in the valley and the increasing trend in the southern border area.