Intensive subway ventilation and smoke exhaust system

The utility model discloses an intensive subway ventilation and smoke exhaust system, and relates to the technical field of subway ventilation and smoke exhaust systems, the intensive subway ventilation and smoke exhaust system comprises two main air guide pipes, one end of each main air guide pipe is provided with a fan, an air bellow is connected between the two main air guide pipes, and the air bellow is provided with an air outlet. Branch air guide pipes are connected to the four corners of the air bellow, a plurality of connecting pipes are installed on the branch air guide pipes, a worker remotely controls all the second air valves on the device, the second air valves between the air bellow and the alarm smoke sensor are all kept in an open state, the rest second air valves on the branch air guide pipes are closed, and the alarm smoke sensor is started. The baffle between the air bellow and the alarm smoke sensor seals the air guide hole on the air bellow, and under the cooperation of the air bellow and