The invention provides an intelligent loop waist transferring device of a paper diaper production line. The transferring device comprises a mounting plate, a bearing seat, a connecting bearing, an inserting shaft, a coupler, a motor, a connecting wheel, a communicated pipeline, a sealing cover, an air transmitting pipe, an air pump, an electromagnetic valve, an air outlet head frame structure, a protective tube structure, an adjusting frame structure, a cleaning frame structure and a collecting box structure, the bearing seat is installed in the transverse middle of the exact front surface ofthe mounting plate through bolts, and the connecting bearing is installed inside the bearing seat; the inserting shaft is inserted inside the connecting bearing, and the left end of the inserting shaft is connected with an output shaft of the motor through the coupler. The loop waist transferring device has the advantages that through the arrangement of the air outlet head frame structure, it is beneficial to adjust the size of the upper portion of the air outlet frame head structure when the device is in use, loop waists with different sizes can be conveniently caught, and it is further beneficial to conveniently use the loop waist transferring device.