Ｏｂｊｅｃｔｉｖｅ　To validate whether the application of LiDCOrapid system could provide timely and effective monitoring in oxytocin-induced hemodynamic changes in obstetric patients undergoing caesarean section.　Methods　Twenty ASA Ⅰ obstetric patients undergoing elective caesarean section were set the continuous noninvasive arterial blood pressure measurement （CNAP） using the LiDCOrapid monitor in operating room. The real-time hemodynamic parameters， including systolic blood pressure（SBP）， diastolic blood pressure（DBP）， mean arterial pressure（MAP）， heart rate（HR）， cardiac output（CO） and stroke volume（SV） were recorded by LiDCOrapid-system at the time when parturient entering operating room， baby delivery and every 10 s after the oxytocin administration until 180 s. Oxytocin related side effects were also recorded.　Results　Following an intravenous bolus of 10 IU oxytocin， the increase of HR， SV， CO and the decrease of SBP，DBP，MAP were observed in all obstetric patients by LiDCOrapid system. These hemodynamic changes recorded by LiDCOrapid system were consistent with LiDCOplus system （an invasive arterial blood pressure measurement） recorded. We used the hemodynamic parameters when the baby delivery as the base value. The largest hemodynamic changes occurred at 40 s-60 s after oxytocin administration， SBP，DBP，MAP，HR，CO，SV changed to （89±12）%，（73±14）%，（81±12）%，（116±12）%，（174±35）%，（150±27）% of the base value respectively at that moment（P＜0.01）.　Conclusions　Compared to LiDCOplus， LiDCOrapid， a reliable non-invasive hemodynamic monitor is useful and sensitive in detecting oxytocin induced hemodynamic changes during caesarean section. Oxytocin induced hemodynamic changes included a rapid increase in HR， CO and SV， and meanwhile a quick decrease in blood pressure.