Abstract: In order to solve the problem that the ultrasonic roller extrusion device is in ultrasonic machining, because the execution tool is in the vertical height direction of the machine tool, the extrusion head always cannot be in the same horizontal line with the central axis of the workpiece, resulting in long processing preparation and difficult height adjustment. A mechanical design method that can not only meet the height adjustment of ultrasonic roller extrusion actuator but also use a precision height adjustment device that is not limited by the machine tool. The worm gear mechanism is used to achieve height direction adjustment, and at the same time the wedge is load-bearing, which can withstand huge loads under the clamping of the tool holder, protect the internal parts, nuts and spring plates to stabilize the members, ensure that the device avoids movement during operation and increases stability. Finally, through test comparison, it is concluded that the height adjustment time of the rolling head after using the device is shortened to less than 30 s, the measured roughness of the workpiece is reduced by 7%, and the diameter deviation is reduced by 50%～67%. It can meet the ultrasonic machining under different working conditions, and achieve precise control of tool height adjustment, which greatly solves the needs of ultrasonic roller extrusion actuator height adjustment when working in different machine tools.