In this paper, existing problems and challenges in the planning of sponge city construction are summarized, and ideas and methods for integrating the planning of sponge city construction into the existing legal planning system are explored. The requirements for the fulfillment of the indicators and management control are put forward from the two perspectives of overall planning and detailed planning, in order to synchronize the processes of urban planning and sponge city planning and comprehensively promote the smooth implementation of sponge city planning.