Abstract: Since the 21st century, in order to resolve the problem of urban waterlogging, sponge city with the core concepts of improving the city's storm runoff retention, storage, and infiltration, as well as water purification, water use and drainage capacity have been put forward. The super absorbent polymer known as the "new sponge" is a type of functional polymer material with extremely strong water absorption. It fits well with the core construction concept of sponge city and is expected to become a important material in sponge city construction.This paper anal-yses the water absorption mechanism and performance of super absorbent polymer, discusses the application pros-pects and challenges of super absorbent polymer in sponge city construction, and draws the conclusion that super absorbent polymer can promote the restoration of the ecological environment around the city and assist the devel-opment and construction of sponge city with low impact, so as to provide reference for the application of super ab-sorbent polymer in sponge city construction.