Abstract: By using linear regression, moving average, Mann-Kendall test ,accumulative anomaly combined moving t test, Morlet wavelet analysis method, et al., the annual, flood seasonal and non-flood seasonal evolution characteristics of precipitation during 1969~2013 in Liuyang River basin were analyzed. The results indicated that: ①The annual and flood seasonal precipitation presented a nonsignificant decreasing trend and the non-flood seasonal precipitation presented a nonsignificant increasing trend during the past 45 years; ②There was an irregular spatial distribution of mean annual precipitation, which showed a decreasing trend from northeast to southwest; ③An abrupt change of the annual and flood seasonal precipitation occurred in 1992, and the abrupt change of non-flood seasonal precipitation was not significant; ④Annual precipitation had the main oscillation cycles of 27 years in common，and the phase change of precipitation in flood season and non-flood season were essentially consistent with those in annual on the time scale. The research results can provide reference for climate analysis and future weather forecasting in Liuyang River basin.