Abstract: [Abstract]Objective： To explore the sevoflurane and propofol anesthesia induction period effects on autonomic nervous function.Methods： Line 110 patients undergoing elective surgery patients were randomly divided into 2 groups， each group of 55 cases. Induced give sevoflurane anesthesia group A， group B to give propofol， observe 2 groups of each time period， the change of the blood pressure， heart rate， etc.Results： Immediately after anesthesia induction and intubation group A immediate breathing rate， blood pressure is lower than before anesthesia (P<0.05). Group B immediately after anesthesia induction， immediate intubation， 5 min after intubation breathing rate， blood pressure is lower than before anesthesia， and the level is lower than at the same time period of group A (P<0.05). Immediately after anesthesia in group A， immediate intubation， 5 min after intubation breathing rate are lower than before anesthesia， after anesthesia induction instantly， immediate intubation high frequency and low frequency is lower than before anesthesia (P<0.05)； Before and after the anesthesia， anesthesia times high frequency ratio comparison (P>0.05). Group B immediately after anesthesia induction and intubation immediately after high frequency and low frequency is lower than before anesthesia， after anesthesia induction times high frequency ratio are higher than anesthesia (P<0.05).Conclusion： Compared with propofol and sevoflurane anesthesia induction with influence on hemodynamics in patients with small， induction of relatively stable， conducive to the operation smoothly.