Sponge city is a new national strategy of urban planning to solve urban flooding in China. Lin Yi city is the third largest city in Shandong Province. Precipitation in Lin Yi city is mainly concentrated in the summer, the ground is located in the plains, but the river system is developed. The foundation of Lin Yi city construction is weak, Lin Yi city must be selected according to local conditions, the selection of sponge, scientific planning and urban construction, the construction of the first priority sponge city demonstration projects, etc, which has strong demonstration significance and a certain reference to China's eastern two or three line