Tunnel ventilation isolation device

The invention provides a tunnel ventilation isolation device which comprises an isolation device body, the isolation device body comprises a bottom connecting plate and isolation cloth, the isolation cloth can isolate air, and a closed operation space is formed by the isolation cloth and the bottom connecting plate; the ventilation device comprises a first air blower, and the first air blower is arranged at one end of the isolation device and used for blowing air to the operation space so that the isolation cloth can be supported. According to the tunnel ventilation isolation device, due to the fact that the isolation cloth is unfolded according to the air pressure difference principle, even if the isolation cloth is damaged in the construction process, the air pressure in the operation space is still larger than the air pressure outside the operation space. Therefore, the existence of the working space can be maintained even if the isolation cloth is damaged. By implementing the tunnel ventilation isolation