Perioperative fluid management is an important part of patient care. Appropriate volume status is a prerequisite for ensuring tissue perfusion and maintaining organ function. Carotid corrected flow time is the time from the beginning of the ascending branch to the notch of the aortic valve closure after heart rate correction. In recent years, using ultrasound to monitor the carotid blood flow spectrum and estimate the carotid corrected flow time has gradually attracted the attention of clinicians in evaluating the volume status. Carotid corrected flow time has its own characteristics when applied in different age groups, and its efficacy in predicting fluid responsiveness is also different. This article reviews the application of carotid corrected flow time in the perioperative period, so as to provide reference for perioperative fluid management.