Automatic feeding device for aluminum door and window corner brace cutting saw and using method of automatic feeding device

The invention relates to the technical field of connecting claws, and discloses an automatic feeding device for an aluminum door and window corner brace cutting saw and a using method thereof.The automatic feeding device comprises a main connecting part and a base fixedly installed at one end of the main connecting part, and a limiting plate is fixedly installed at the end, away from the base, of the main connecting part; the outer circle of the limiting plate is sleeved with a rotating sleeve capable of freely rotating, at least one set of connecting claw main rods are fixedly installed on the outer circle of the rotating sleeve, connecting claw auxiliary rods are movably installed at the ends, away from the rotating sleeve, of the connecting claw main rods, and the connecting claw auxiliary rods are bent rectangular rods in an inclined downward state. According to the connecting claw, the locking gear is separated from the angle adjusting gear by pressing the locking gear downwards, at the moment, the conne