Rainfall is one of the main dynamic factors that cause soil water erosion. In order to explore the effects of different levels of rainfall on the characteristics of soil water erosion in Shaoguan City, the daily rainfall data of Shaoguan City from 1951 to 2018 were selected, the daily rainfall erosivity model was used to calculate the rainfall erosivity, and the variation coefficient and trend coefficient were used to analyze the changes of rainfall erosivity indifferent time scales. The results indicated that: (1) The average annual rainfall erosivity of Shaoguan City in 68 years was 9 314 (MJ·mm)/(hm²·h·a), and the variation coefficient was 0.29, which was a medium variation. (2) The annual rainfall, rainfall days, erosive rainfall and rainfall days showed an upward trend, while the non-erosive rainfall and rainfall days showed a downward trend, and heavy rainfall volume and rainstorm erosivity showed an obvious upward trend, indicating that rainfall was more concentrated and rainfall erosivity increased in Shaoguan City. (3) The proportion of rainfall days and rainfall over heavy rain to total rainfall days and total rainfall was 43.91% and 51.15%, respectively, while the proportion of rainfall erosivity caused by heavy rain to total rainfall erosivity was 77.05%. The results could provide reference for soil erosion monitoring and soil and water conservation in Shaoguan City.