Abstract: The spatial and temporal distribution feature of the rainfall anomaly field of season and year about Yunnan are analyzed using precipitation anomaly field data of every month and every season from January in 1961 to December in 2002 of wide province 125 meteorological observing stations,and using the method of empirical orthogonal function(EOF).Following is the result:There are three main stationary types:① All over the province is consistent;② The north-south distribution(the Winter and Spring season);③ The northeast-southwest type(Summer season);④ The northwest-southwest type(Autumn).and at the same time,the south variable gradient is greater than the north variable gradient,the western variable gradient is greater than eastern variable gradient.