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The sponge city facilities are optimized and designed in consideration of less permeable underlying surface and more impermeable underlying surface of Changzhen depot of Shenzhen metro. In addition to the traditional sponge city facilities such as raingarden, grass planting ditch and underground water storage modules, innovative sponge city facilities such as ecological roof, bioretention parterre and multifunctional pond are designed. The retention capacity and effect of the sponge city facilities of three design schemes are calculated and simulated by volumetric method and storm water management model ( SWMM). The results show that the sponge city facilities of three design schemes can meet the design requirements of zero runoff under annual runoff control rate of 70%. The results of SWMM simulation show that sponge city facilities can reduce the runoff volume, runoff peak and runoff coefficient of Changzhen depot; however, the reduction effect of sponge city facilities gradually decreases with the increase of rainfall return period, and sponge city facilities almost have no reduction effect when the rainfall return period is more than or equal to 50 years. Considering the technical and economic factors, the second design scheme is selected as the sponge city implementation scheme of Changzhen depot. According to the requirements of the code for construction and acceptance of urban landscaping projects (CTJ/T 82-2012) and the code for green construction of building (GB/T 50905-2014), the sponge city facilities of Changzhen depot as a green construction have finished and have become the first metrosponge city project in the world, which lays a foundation for the promotion and application of sponge city concept in urban rail transit projects. [ABSTRACT FROM AUTHOR]