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The spatial distribution characteristics of flood season precipitation are analyzed with EOF by means of the data of flood season precipitation measured by 36 meteorological stations in Shaanxi Province from 1959 to 2003. According to the distribution of eigenvectors, the precipitation distribution patterns during flood season in Shaanxi Province can be divided into three types: consistent distribution, southnorth oscillation, and more/less〖CD*2〗less/more〖CD*2〗more/less from north to south. Several good indicators for forecasting flood season precipitation are obtained through correlation analysis of the first three time coefficients of EOF and the factors such as SSTA of key areas and variation of atmosphere general circulation. These factors proved useful in predicting the spatial distribution of precipitation in flood season in Shaanxi Province.