On the basis of precipitation database in upper and middle reaches of the Lushui rive rduring the period from 1959 to 2013，the long－term trend of precipitation in upper and middle reaches of the Lushui river was analyzed by using the Kendall rank correlation test，and the isopleth maps of the series of precipitation were made by professional mapping software，the spatiotemporal distribution of the long－term trend of precipitation in upper and middle reaches of the Lushui river was analyzed．The study results are as follows：Firstly，the mean annual precipitation was in anincrease trend and its gradient was 1.720mm / a，the irrigationperiod and the withered water period showed an increasing trend，and the flood season showed a decreasing trend．In addition，the precipitation of floodseason occupied 44.2%of the annual precipitation．Secondly，spatially，upstream annual precipitation is higher than downstream，the maximum valueof annual precipitation occurred in the Zhangzhuang station，and the maximum value occurred in the Donggu station．In all periods except the flood season，the precipitation showed anincreasing trend all over thestudied area，the maximum value ofthe gradient inirrigationperiodoccurred in the Zhangzhuang station，and the maximum value of the gradient in withered water period occurred in the Yangxi station．The values of gradient in flood season were both negative and positive showing the change complexity，the reduction gradient of Donggu station was the largest，that was -1.189mm/a，and the increment gradient of Yangxi station was the largest，that was 1.099mm/a．