In order to facilitate the development and application of the seismic fragility analysis of underground structures in China， this paper presents a review of recent advance in seismic fragility research of underground structures， the existing issues and future tendency of this research topic are also discussed. Firstly， the definition of seismic fragility is described. Then， the selection of damage measure and intensity measure， as well as the effect of uncertainties， are discussed respectively. Two most widely-used methods for the construction of fragility curves in underground structures are introduced later. Based on the different sources of analysis data for the fragility analysis， five common used seismic fragility analysis methods for underground structures were summarized， and their applicability are also presented. Finally， the existing issues and the future tendency of seismic fragility analysis of underground structures are discussed.