To promote the development of the sponge city in Shanghai and ensure the effectiveness of its planning,construction,implementation,operation and maintenance,it is essential to optimize the implementation mode of sectoral planning and implementation plan for sponge city.Based on the practice of sponge city planning and construction in Shanghai,this paper summarizes the issues existing within the"sponge sectoral planning+annual project library plan"model,and highlights that the"sponge city system plan"model has not formed an effective coordination mechanism for construction and operation.Therefore,a suggestion is made to introduce a coordination mechanism for planning and implementation,discuss the mode of construction of"sponge city system planning and implementation platform",and emphasize that this coordination mechanism will facilitate the transition of sponge city builders to operation and maintenance personnel.The paper also suggests improving the operational efficiency of sponge facilities through full life cycle control,building a platform for co-construction and sharing to guide multiple entities to participate in planning,construction and management,and optimizing the implementation of sponge city system solutions through dynamic adjustment and evaluation feedback.