Subway ventilation kiosk

The invention discloses a subway ventilation kiosk, which comprises a steel structure frame main body and a case, wherein the steel structure frame main body is formed by splicing a plurality of steel structure unit modules, each steel structure unit module comprises a rectangular support frame and support posts led out from the corner positions and the edge middle point positions of the rectangular support frames, the support posts are inwards connected between every two rectangular support frames for forming four connecting points, longitudinal support posts are arranged between every two support frames, a top cover is arranged on the top of the steel structure frame main body, the case covers the outside of the steel structure frame main body, and is formed by splicing a plurality of case unit modules, the outside structure of each case unit module is identical to the appearance structure of each steel structure unit module, an air window is formed in a downwards inclined surface of each case unit module,