根据北京铁路地下直径线大直径泥水盾构要求，结合以往施工经验，介绍北京铁路直径线盾构施工辅助设备（泥浆循环系统、泥水处理系统、运输系统、砂浆拌制系统、通风系统及冷却循环系统）选型的依据，分析影响选型的因素，介绍选型过程（包括参数选择）及设备配置结果。

On basis of the requirements of the largediameter slurry shields for Beijing Underground Rail Transit Line and the construction experience, the author presents the basis for the type selection of the ancillary construction equipment (including the slurry recycling system, the slurry treatment system, the transportation system, the mortar mixing system, the ventilation system and the coolingrecycling system) for the largediameter slurry shields used for Beijing Underground Rail Transit Line, analyzes the factors that have influence on the type selection, describes the type selection process (including the parameter selection) and the equipment matching results.