This paper is based on the investigation on soil erosion situation of Nandu River,which the main water supply source in Leizhou.The results indicated that the soil erosion area of Nandu River basin covered mainly the middle and upper stream,that is,the six towns of Yangjia,Baisha,Kelu,Tangjia,Jijia and Songau.The total soil erosion area is 61.23 sq.km.,in which surface erosion is 23.5 sq.km.,ditch erosion is 12.6 sq.km.,landslip erosion is 25.15 sq.km..The soil erosion has been the priority for water resources conservation of Nandu River System.The transformation projects of Nandu River will take effective measures to protect the environment of Nandu River and improve the current situation of soil erosion in Nandu River after investigation and understanding of the current situation of soil erosion in Nandu River.Also,corresponding construction plans for water and soil conservation of Nandu River will be brought up according to its soil erosion situation.