Elliptical ultrasonic vibration-assisted machining(EVAM) technology is an effective method to improve the processing quality of difficult-to-cut materials. The aim of the present study was to develop a finite element model in order to investigate the effects of ultrasonic vibration parameters (frequency and amplitude) on the machining residual stress and surface morphology of Ti6Al4V. The results of finite element analysis showed that ultrasonic vibration-assisted cutting could increase the maximum residual compressive stress distribution depth

but would deteriorate the surface morphological integrity of the workpiece. The Y-directiona vibration impulse impact load on the surface of the workpiece was conducive to increase the residual compressive stress field of the workpiece. The morphological integrity of the workpiece surface gradually improved with the increasing of vibration frequency and X-direction amplitude

and deteriorated with the increasing of Y-direction amplitude. Increasing the vibration frequency and amplitude was beneficial to the formation of residual compressive stresses on the workpiece surface and improve the machining quality of the workpiece.