Air exhaust and smoke exhaust system shared by two fireproof units

The utility model provides an air exhaust and smoke exhaust system shared by two fireproof units, which comprises an air exhaust and smoke exhaust pipeline, a first fireproof unit, a second fireproof unit and an air exhaust and smoke exhaust machine room, and an air exhaust and smoke exhaust centrifugal fan is arranged in the air exhaust and smoke exhaust machine room; the air and smoke exhausting pipeline comprises a first air and smoke exhausting pipeline and a second air and smoke exhausting pipeline which serve the first fireproof unit and the second fireproof unit respectively; the first air exhaust and smoke exhaust pipeline and the second air exhaust and smoke exhaust pipeline enter the main air exhaust and smoke exhaust pipeline and enter the air exhaust machine room; the main exhaust and smoke exhaust pipeline is connected with the exhaust and smoke exhaust centrifugal fan, and the end of the main exhaust pipeline is connected into an exhaust shaft. According to the utility model, the two fireproof u