北京地铁西单车站是我国首次采用暗挖法施工的地铁车站，它的建成标志着我国地铁及地下工程施工技术的重大发展。文章叙述了西单车站的设计和施工概况。 Beijing Metro Xidan Station is the first metro station constructed by undercutting method in China. Its completion marked the significant development of subway and underground construction technology in China. The article describes the Xidan station design and construction overview.