Connecting structure of chicken house ventilating duct

The utility model relates to the technical field of ventilation pipeline connection, in particular to a chicken house ventilation pipeline connecting structure which comprises a left connecting main plate and a right connecting main plate, a plurality of sets of fastening screws are connected between the left connecting main plate and the right connecting main plate, and reducing pipes are connected in the left connecting main plate and the right connecting main plate in a penetrating mode. Movable eccentric sleeves are in threaded connection with the positions, located at the left end and the right end, of the outer side of the reducing pipe, a sealing gasket is attached to the interior of the reducing pipe, a ventilation pipe is arranged in the reducing pipe, a sliding rod is connected between the two sets of fastening screws located on the same side, and the outer side of the sliding rod is sleeved with a pipe hoop clamp in a front-back sliding mode; connecting lugs are arranged at the top and the bottom o