地铁换乘车站规模大、难点多，是地铁车站设计的难点。北客站站为西安地铁机场线与四号线的“倒厅”换乘车站，为解决“倒厅”换乘环控方案设计难点，结合北客站站设计实例，通过分析车站周边的控制因素，探讨车站风井对西安北站北广场的影响、过轨风道对车站规模的不利因素、站厅与站台楼扶梯口烟气控制、烟气“倒灌”等问题，确定适合本站的通风空调方案，使车站良好地满足各种设计工况，为地铁“倒厅”换乘车站环控方案的选择提供参考依据。

The largescale Metro interchange station is the key to the design of Metro station. The Xi’an North Railway Station is the interchange station between Airport Line and Line No. 4 of Xi’an Metro. The environmental control of the interchange station is difficult. As a result, the control factors of the interchange station surrounding environment are analyzed; and the influence of ventilation shaft on North Xi’an North Railway Station Square, that of crossrail ventilation gallery on the interchange station scale and smoke control of escalator between hall and platform are discussed. Finally, the airconditioning system is decided and the application results are good. The results can provide reference for environmental control design of interchange station.