Divided ventilation and smoke discharge device

The utility model relates to a divided ventilation and smoke discharge device, comprising a plurality of tunnel supports and a plurality of I-shaped steel door type frameworks, wherein the tunnel supports are fixedly installed in a tunnel; the I-shaped steel door type frameworks are fixedly installed outside the tunnel; the tunnel supports are fixedly connected with cross beams through angle steel brackets and expansion bolts; the middle part of each cross beam is fixedly connected with a first connecting piece through a first hauling steel rope; a ventilation fan is fixedly installed on the cross beam on the end in the tunnel; a second color plate is connected between the cross beam on the end in the tunnel and the tunnel support; the top end of each I-shaped steel door type framework is fixedly connected with a threaded steel arc-shaped framework through a second hauling steel rope; a third color plate is fixedly connected onto each threaded steel arc-shaped framework; and the top end of each I-shaped steel