The aim of the present research is to better understanding the characteristics of climate change in the Bahe river drainage basin. The annual and inter-annual precipitation changes,the abrupt change time,and the variation period of precipitation are analyzed based on observations in the past half century. Moving-average method,R /S analysis,Mann-Kendall test,and wavelet analysis are adopted for the research. Results reveal that 1) from 1958 to 2012,precipitation presented a decline trend with fluctuations,and will keep declining in the next several years; 2) precipitation is extremely uneven in a year,mainly focused from July to September,decreasing obviously in spring and autumn,and rising slightly in summer and winter; 3) Hurst index of precipitation in four seasons are all less than 0.5,and the precipitation series have features of anti-continuity and negative correlation; 4) annual precipitation has apparent abrupt change in 1989,and abrupt changes are also found in the spring,summer and autumn in 1994,1979,and 1985,respectively,with no abrupt change in winter; 5) the variation period of annual and seasonal precipitation fluctuates in time scales of 22-29 a,13 a,and 4-8 a,and the periodic change differs greatly in various scales.