Abstract: To reveal the trend of extreme precipitation in Guangyuan of Sichuang，base on the hourly and daily precipitation data during 1961～2015 to analysis the characteristics changing tendency of the diurnal variation of precipitation，hourly precipitation intensity， short-period heavy precipitation， and select the four extreme precipitation indices recommended by the World Meteorological Organization to study the extreme precipitation events in Guangyuan.The results indicate that:The interannual variability of total precipitation in Guangyuan is not obvious，but hourly precipitation is getting more and more extreme.The hourly precipitation shows an increasing trend from02:00am to06:00am，and diurnal variation of trend magnitudes of precipitation in Cangci and Qingchuan is single peak-valley pattern， and Wangcang， Guangyuan and Jiange is one valley between two peaks pattern， the frequency of short-period heavy precipitation in most area of Guangyuan is increase yearly， and the interdecadal change in the 1980s has an obvious increase especially in Wangcang which increases71%，the maximum hourly and daily precipitation in Guangyuan are increasing.The trend magnitudes of very heavy precipitation days（R25mm），simple daily intensity index（SDII） and very wet day precipitation（R95） is 0.0558d·a^-1， 0.0168mm·d^-1·a^-1 and 0.5998mm·a^-1，respectively， while consecutive wet days（CWD） decreased by-0.0202d·a^-1 during 1961～2015 in Guangyuan， which the number of continuous precipitation days is decreasing per year，while the precipitation is getting more and more extreme.