Rainfall erosivity (R) is related to rainfall amount, rainfall duration, rainfall intensity, and rainfall kinetic energy. It reflects the influence of rainfall characteristics on soil erosion and is one of the important factors affecting soil erosion. Using the daily rainfall data of 25 meteorological stations in Jiangxi Province from 1961 to 2019, based on the rainfall erosivity model, through Mann-Kendall correlation test, wavelet analysis and Kriging spatial interpolation method, the spatial distribution and variation trend of rainfall erosivity in Jiangxi Province were analyzed. The results show that the annual average rainfall and rainfall erosivity in Jiangxi Province gradually increased from southern Jiangxi to northern Jiangxi, and the spatial distribution of rainfall and rainfall erosivity were similar; the rainfall erosivity in spring and summer ranged from 3000 to 6000 MJ·mm· hm-2·h-1·a-1, and the maximum rainfall erosivity in spring is higher than that in summer, while the rainfall erosivity in autumn and winter is significantly smaller than that in spring and summer; the annual rainfall erosivity in Jiangxi Province is evenly distributed, and the average maximum value is distributed in northern Jiangxi area, followed by central Jiangxi and southern Jiangxi, and the erosive force gradually decreased from north to south. The research shows that the erosion factors caused by rainfall are increasing in Jiangxi Province, especially in spring and summer, and there are obvious differences in their spatial distribution.