The invention provides an automatic production line of air pipes. The automatic production line comprises a winding plate, a leveling machine, a rib pressing machine and a common-plate flange device,wherein the winding plate penetrates through the leveling machine, the rib pressing machine and the common-plate flange device in sequence; a plate-shearing and seaming integration machine is arrangedbetween the rib pressing machine and the common-plate flange device; a pressing wheel and an angle cutting machine are arranged on the outer side of the rib pressing machine; a cut-off knife is arranged at the middle part of the lower end surface of the plate-shearing and seaming integration machine; a transmission gear and a bending plate I are arranged at one side of the lower end surface of the plate-shearing and seaming integration machine; a bending plate II is arranged at the other side of the lower end surface of the plate-shearing and seaming integration machine. The automatic production line provided by the invention is applicable to machining of the air pipes with the edge length being 150mm or more of an air blowing and exhausting system, an air conditioning system, a dust removing system and a smoke control and exhausting system and the like at all places such as houses, hospitals, hotels and garages and the like.