Based on the monthly precipitation date from 2 stations in the South of Shandong Province, the se cular variation tendency of precipitation and the drought frequency are analyzed with the accumulated anomalous, skids the ttest and KruskalWallis assay metho d. The results show that there is a evident decrease of the precipitation in the south of Shandong Province since 1950s, and a sudden change spot in the mid 197 0s. After the chang spot, the precipitation reduced above 12%, especially in the rainy season, the precipitation reduced remarkably, above 16%. The dry season p recipitation change was not remarkable. The droughts all happened after the sudden change spot. The dry season frequency and their intensities obviously increas e since the sudden change spot. The frequencies of the 3 dry month are high and the periods of continuous droughts are obviously long.