Based on the daily precipitation data of 1961 ~ 2010 from 9 meteorological stations in Tibet and combined with the threshold of extreme precipitation defined by the method of percentiles,the impacts from the extreme precipitation days and their mean precipitation intensities, the extreme precipitation events with various durations and the climate changes on the spatio-temporal variation characteristics of extreme precipitation events in the region are analyzed herein. The results show that( 1 ) in the region to the west of 92°E, the mean precipitation intensities of the extreme precipitation days present an increasing trend, while they show a decreasing trend in the region to the east of 92°E; (2) the durations of the extreme precipitation events are mainly 1 d with the frequencies of 4. 3 times/a year and the intensities of 20 mm/d or above generally,while Linzhi and Bomi meteorological stations are located in the high value zones of the frequency and the intensity; (3)under the background of climate change, the frequencies and intensities of the extreme precipitation events exhibit a tendency of moving to the west.