House building ventilation structure

The utility model relates to the technical field of ventilation equipment, in particular to a house building ventilation structure which comprises a device body, the device body comprises a supporting frame, the top end of the supporting frame is connected with a ventilation pipe, one side of the inner surface of the ventilation pipe is provided with a ventilation plate, one side of the ventilation plate is connected with a servo motor, and one end of the servo motor is connected with a fan; the outer wall of the servo motor is sleeved with a supporting structure, the supporting structure comprises a bearing ring, and rubber pads are arranged on the two sides of the bearing ring. The two sets of limiting rings are connected to the surface of one end of the servo motor, one end of the first screw penetrates through the through hole formed in the ventilation pipe to be rotationally connected into the threaded hole formed in the supporting rod, the supporting rod is limited, and therefore the supporting rod is u