This article takes the hydrologic network around Poyang Lake as the research object，and uses the data of precipitation from 1956 to 2016.It uses the linear regression，Mann-Kendall method，pettittt method，and Morlet wavelet analytical method to conduct annual and inter-annual trends，Mutation analysis and cycle analysis.The results show that the seasonal variation of precipitation during the year is large，with heavy rains in summer and less rain in winter.The main flood season accounts for more than 50% of the annual rainfall.The distribution during the year is extremely uneven，but the interannual variation is not large.Consumption increases，while precipitation in the nonflood season and the flood season mutually increases，causing the overall interannual trend and abrupt change in the year.From a cyclical point of view，the annual rainfall has a main cycle of about 28 years，with four periods of high water，three periods of low water.Under the 28-year scale， there will be more precipitation after 2016 and less precipitation after 2019.