Research conclusions: It contains retaining walls，culverts and bridge structural design in one system． The top of the wall surface，composed of rigid frame and sidewalk cantilever plate，meets the need of the layout of the station professional ancillary facilities． This structure design not only reflects the innovation and rationality of subgrade design，but also ensures the safety of existing lane and the existing building． After operation，its benefits of small footprint，wide bottom base，better itself stability，high level of resistance，and better anti － slide，anti － dumping effect，are fully reflected． But it also plays with the dual role of slope retaining and slopes receive． So，in the future，this design has the important reference value for the same type of railway roadbed engineering design and construction．