[Objective] The impacts of heavy rainfall caused by typhoon on rainfall erosivity were explored in order to provide a theoretical basis for the prediction, prevention and control of soil erosion.[Methods] Based on the hourly rainfall erosivity model, the temporal and spatial distribution of rainfall erosivity during typhoon Mangosteen landing in Guangdong Province in 2018 was calculated.[Results] ① The rainfall erosivity in Guangdong Province was related to the typhoon path. On the 15th, September 2018, the rainfall erosivity was the highest in the eastern part of Guangdong Province, while the largest rainfall erosivity in the west was occurred on the 16th and 17th; ② Rainfall erosivity in Guangdong Province tended to be centered arond Yangchun City and decreases to both sides during typhoon Mangosteen, especially in Northern and Eastern Guangdong Province; ③The stations with large rainfall also showed a large rainfall erosivity, but it was not a one-to-one correspondence. Rain strength and rainfall kinetic energy were also important factors affecting rainfall erosivity.[Conclusion] The heavy rainfall caused by typhoon affected the distribution of rainfall erosivity in Guangdong Province from 15th to 17th September 2018, and the path of typhoon movement determined the magnitude of rainfall erosivity.