In this paper，the annual precipitation changing trend during 1961-2016 in Nanning was analyzed by using the linear tendency，anomaly percent，moving average curve，cumulative filter method，Kendall test method and R/S which are commonly used in hydrological sequence. In addition，Mann-Kendall and Morlet wavelet analysis method was adopted to test the mutability and periodicity of the sequence. The results show that from 1961 to 2016，Nanning annual precipitation roughly shows an upward trend，but not obvious, and it is very likely that rainfall will continue to increase in the next few years. In the recent 10 years， the annual rainfall series have changed frequently, which may be attributed to the global climate change. The annual precipitation sequence show the 13a-period，but there may be a larger period，though it is not shown. The 1961-2016 annual rainfall sequence is approximately 13 years and may potentially exceed the 30-year cycle, but can not be visualized due to sequence length limitations.