The invention discloses a metro station affiliated ventilation pavilion vertical-shaft section excavating and residue discharging structure. An affiliated ventilation pavilion comprises a vertical-shaft section and an underground air channel and is used for achieving air circulation between a metro station and the outside. The excavating and residue discharging structure is characterized in that aresidue leaking hole downward vertically is drilled at a vertical-shaft section position to be excavated, only the upper-portion cross section of the underground air channel is excavated to make themetro station and the residue leaking hole communicated and serve as a residue discharging channel during vertical-shaft section excavation, and the residue discharging channel is connected with an existing metro station construction channel, so that residue soil produced in the vertical-shaft section excavation process is transported out through the residue leaking hole, the residue discharging channel and the metro station construction channel. In addition, the invention also provides a construction method for metro station affiliated ventilation pavilion vertical-shaft section excavating and residue discharging. According to the site limitation situation, the mode of residue discharging based on the residue leaking hole is adopted for the vertical-shaft section excavation, the construction site requirements are small, the influence of outward transportation of residue soil on the surrounding environment is small, the method is not limited by weather, and the residue leaking efficiency is higher than the residue leaking efficiency of vertical lifting.