The invention discloses a non-contact energy transmission type 
ultrasonic machining device. The non-contact energy transmission type 
ultrasonic machining device comprises a 
grinding head, an amplitude-change rod, a 
front cover plate, piezoelectric 
ceramic, secondary magnetic ring coil, a primary magnetic ring coil and a tool 
handle. The 
grinding head, the amplitude-change rod, the 
front cover plate and the tool 
handle are sequentially connected, the piezoelectric 
ceramic is arranged in a concave 
assembly position of the tool 
handle, the secondary magnetic ring coil is fixed to the 
front cover plate, the primary magnetic ring coil is arranged on a mechanical arm of an ultrasonic 
machine, and gap is formed between the secondary magnetic ring coil and the primary magnetic ring coil. The non-contact energy transmission type 
ultrasonic machining device is ingenious and reasonable in structural design; because of the non-contact energy transmission structure design, not only is non-
contact high-efficiency transmission of 
electric energy achieved, but also the problem of traditional 
slip ring abrasion in ultrasonic 
machining is solved, the 
heat generation phenomenon caused by 
contact friction is avoided, the rotation speed of a spindle is increased without limitations, and meanwhile the automatic tool changing requirement of a 
machining center can be met; moreover, because no exposed conductors exist, 
electric energy transmission is not influenced by environments, and the non-contact energy transmission type ultrasonic 
machining device is good in working stability, safe, reliable, capable of keeping work for a long time and high in working efficiency.