The soil erosion of mountain areas in South China has been one of the most imprortant deteriorative causes of agroecoenvironment, In this paper, the characteristics of soil erosion and its influence on agroecoenvironment in the mountains of East Guangdong province were analysed, i1}Ieanwhile, it was pointed out that the control on soil erosion is the key to improve agroecoenvironment of the mountains, At last, the.author put forward the measures of controlling soil erosion and improving agroeco.environment in the mountains of East Guangdong province.