Landfall erosion is the most important type of soil erosion in the mountain areas of South China.The control over landfall erosion is the key to controlling water and soil erosion.This paper deals with the behaviours of landfall erosion in granite weathering crust in the mountain areas of South China with Xinyi village,Wuhua county,Guangdong Province in the upper reaches of the Hanjiang River as an example ,and analyses the relationgships of special development of landfall erosion of granite weathering crust and the nature of weathering crust soil.Also,it discusses the effects of controlling granite landfall erosion by the method of combiantion of biological measures with engineering practices