Air duct rolling machine

The utility model discloses an air duct rolling machine, belongs to the technical field of air duct rolling machines, and solves the problems that the end part of a rolled air duct is not flat, namely the rolling is inclined, because an existing hydraulic rolling machine cannot limit an air duct plate to be rolled. The pump station and the rotary driving mechanism are arranged on the support, the telescopic mechanism is arranged on the support and connected with the pump station, the first winding drum and the second winding drum are arranged on the support and driven by the rotary driving mechanism to rotate, and the third winding drum is arranged on the support and driven by the telescopic mechanism to ascend and descend. A limiting structure for limiting the two ends of the air duct plate is arranged on the bracket; the limiting structure comprises a left telescopic mechanism arranged on the left side of the support, a right telescopic mechanism arranged on the right side of the support, a left limiting gr