Stroke volume variation (SVV) is an important hemodynamic index for dynamically monitoring circulatory volume and predicting preload responsiveness, which is sensitive, accurate, and safe. SVV is produced by the interaction between heart and lung, and can be continuously monitored by arterial pressure waveform analysis technology. The correlation between SVV and volume change is better than that of static hemodynamic index. However, whether SVV is suitable for thoracic surgery has always been controversial. This paper reviews the monitoring of one‑lung ventilation (OLV) in thoracic surgery by SVV, including different puncture sites, body position changes, cardiovascular function and different ventilation modes in lung ventilation, tidal volume and respiratory rate, positive end expiratory pressure, as well as OLV during operation, open chest, lung recruitment and other factors that affect the accuracy of blood volume change and its research progress, so as to help the clinical perioperative volume management of patients more safely and effectively