Based on the daily precipitation of 18 weather stations in Qilian Mountains and Hexi Corridor in 1960-2009, the temporal and spatial changes of precipitation extremes were analyzed by using methods of linear trend, ten moving trend and Mann-Kendall and thirteen indexes of precipitation extremes. The results indicated that the day numbers and amounts of precipitation extreme are on increasing, and this is contrary to intensities of precipitation extremes. Consecutive dry days and consecutive wet days are on decreasing, but max one day precipitation amount and max five day precipitation amount are on increasing. The change trends of precipitation extremes existed certain regional differences that the precipitation amount increased obviously and the variability of precipitation decreased gradually in the middle and west of Hexi Corridor, that the day numbers and the degrees of precipitation extremes increased in the middle of Hexi Corridor, that the amounts and the degrees increased in the east of Hexi Corridor and Qilian Mountains, and that the amounts and the degrees increased obviously in the middle of Qilian Mountains where it is most sensitive to global warming than other regions. The indexes of precipitation extreme changed abruptly in the middle of 1960s, the middle of 1970s, the first of 1980s, the middle and later of 1980s and the middle of 1990s. The abrupt spots are consistent to the times of the strong and weak change of East Asia Monsoon, South Asia Monsoon and Westerly Wind circulation.