Automatic tool changing ultrasonic knife handle

The invention relates to the field of mechanical ultrasonic processing and discloses an automatic tool changing ultrasonic knife handle. The automatic tool changing ultrasonic knife handle comprises aknife handle and a transducer, wherein an electromagnetic conversion device is arranged on the outer side of the knife handle; the electromagnetic conversion device is fixed to the outer side of theknife handle and is designed integrated with the knife handle; one end of the transducer is arranged in the knife handle and the transducer comprises an amplitude-change pole, a piezoelectric ceramic,a transducer pressure block and a compression screw. The transducer and the knife handle are integrally connected by way of extrusion in interference fit. The compression screw is successively connected to a transducer pressure cover, the piezoelectric ceramic and the amplitude-change pole and is firmly connected to the transducer pressure cover, the piezoelectric ceramic and the amplitude-changepole through gland nut of t