The invention discloses an ultrasonic cutting shank for a honeycomb core. The ultrasonic cutting shank for the honeycomb core comprises a shank, a rotating mechanism, a transducer, a first-grade amplitude-change pole, a second-grade amplitude-change pole, an ultrasonic cutting cutter and an ultrasonic power transmission mechanism. The ultrasonic cutting shank for the honeycomb core has the large-amplitude output capacity, takes the requirement for interchangeability between different vibration systems into consideration, solves the problem that the applicability, to a universal machine tool, of the ultrasonic cutting shank is poor and improves the automatic level of ultrasonic cutting.