High -rise building ventilation system

The utility model relates to a high -rise building ventilation system, including the underground ventilation structure and the structure of ventilating on the ground, the underground ventilation structure communicates with each other with the structure of ventilating on the ground, the structure of ventilating on the ground is including setting up vertical ventilation shaft, an air pipe and the 2nd air pipe in high -rise building, the 2nd air pipe intercommunication of each indoor air pipe of vertical ventilation shaft and each floor layer and each floor plywood, be provided with in each floorplywood with the communicating subsidiary conduit of the 2nd air pipe. The utility model discloses a ventilation system need not with the help of the motor setting the indoor natural draft that carries on of high -rise building, reduces the energy consumption, with the help of a subsidiary conduit and an air pipe's main air outlet, to indoor, especially subaerial moist the ventilation is got ridof, prevents the damage of