Nanjing Jiangbei Emergency Water Source Construction Project is the requirement of high-quality development, and is an important project to implement the requirements of the provincial government to ensure the safety of urban water supply and ensure the people's livelihood. Combined with the construction project of the second water source and supporting facilities in the integrated green development demonstration zone of Nanjing Jiangbei Yangtze River Delta, through the prediction of soil erosion possibly caused by the project construction, the overall layout corresponding prevention measures is put forward accordingly. The effect provides the experience reference for the scheme preparation of water and soil conservation of similar urban emergency water source construction projects.