Carbon fiber reinforced plastic (CFRP) Composites have been widely employed in a variety of purposes, in a variety of industries because of its exceptional abilities. Drilling a number of holes is required in CFRP in the aircraft industry. As a result, developing inexpensive drilling method is critical. Rotary ultrasonic machining (RUM) was used to successfully drill CFRP. By categorizing the findings provided in two angles, this paper investigates literature review and gives a complete evaluation of the improvements in USM of CFRP composites. To begin, the review highlights the majority of the reported investigations from 2012 to 2021 on the basis of used USM process on CFRP material including equipment/system utilized to conduct experiments, output results and process variables evaluated, and problems investigated. The purpose of this literature study is to emphasize USM's current research position in CFRP composite drilling and thereby provide direction and a foundation for future research.