针对高强度钢精密深孔加工中存在的难题 ,研制了一套超声珩磨装置并进行了试验研究。通过对超声珩磨运动学的研究 ,给出了确定临界珩磨速度的理论公式。借助于SEM对表面粗糙度、表面形貌进行了分析 ,得出超声珩磨明显优于普通珩磨。文中还通过实验得出了超声珩磨的谐振频率随负载的增大而增加的结论 In order to solve the problems existing in the machining of high-strength precision steel deep hole, an ultrasonic honing device was developed and tested. By studying the kinetics of ultrasonic honing, a theoretical formula for determining the critical honing speed is given. By means of SEM, the surface roughness and the surface morphology were analyzed. It was concluded that the ultrasonic honing is obviously better than the ordinary honing. In this paper, we also conclude that the resonant frequency of ultrasonic honing increases with the increase of load