The heavy precipitationwas analyzed based on the data from 1943 to 2008 in 6 representativemeteorological stations in Linxiawhich is located in the northeast side ofQinghai-TibetPlateau. At first, the spatial and temporaldistribution ofheavy precipitation in this region was analyzed, and then, the return periods ofheavy precipitationwas assessed by Pearson-III dis ributionmethod. Results show that the days ofheavy precipitation increased conspicuously since the 1980s. The return periodwas calculated abouta heavy precipitation event in this region occurred on August20, 2008, and the result accorded with the artificial-assessment.