The temporal-spatial feature of secular variation of global land rainfall fields for June-August during 1948-2001 is investigated based on the global land monthly data PREC/L.The result shows that the maximum rainfall for June-August happened in the several famous monsoon areas,and their standard deviation is bigger in monsoon areas than the others.The global land rainfall of June-August represents a main feature of the negative trend variation,The regions with significant reduction of rainfall include tropical-Africa,north of Huaihe River of China,the eastern,central and western Siberian of Russia,North Korea and the South Asian.While,those with increase of precipitation are the northern-Canada,Brazil,central Greenland and etc.The trend of coefficients in 12 latitudinal zones is significant with 95% of confidence level except one (65～60°S)-with positive trend.The areas with positive trend coefficient are very small.The relation between the trend variation of global land rainfall for June-August and ENSO is preliminary discussed.