The invention discloses an amplitude-change pole for a honeycomb core ultrasonic cutting system. The amplitude-change pole is characterized by comprising an amplitude-change pole inner cooling connection screw, an ultrasonic cutting amplitude-change pole connection base, a rapid changing type ultrasonic cutting amplitude-change pole core and an ultrasonic cutting knife. From the fact of ultrasoniccutting, the requirements of high-quality and high-efficiency machining for honeycomb core ultrasonic cutting are met, the amplitude-change pole has the advantages of being convenient to disassemble,high in interchangeability and the like, and the honeycomb core ultrasonic cutting machining efficiency and automatic level can be improved.