Objective To observe the effect of butorphanol and sufentanil combined analgesia regimen in patients with mechanical ventilation in intensive care unit（ICU）and its influence on hemodynamics．Methods A prospective,randomized controlled study was carried out on 118 patients with mechanical ventilation in ICU from March 2021 to March 2023,and the enrolled patients were randomly divided into observation group and control group with 59 cases in each group．The observation group received butorphanol combined with sufentanil analgesia regimen,and the control group received sufentanil analgesia regimen．The conditions of sedation and analgesia（sedation onset time,recovery time after drug withdrawal,mechanical ventilation time,ICU stay length,total dosage of propofol）were compared between the two groups．The hemodynamic indexes [heart rate（HR）and mean arterial pressure（MAP）] of the two groups were compared before medication（T0）,6 h（T1）,12 h（T2）and 24 h（T3）after medication as time nodes．At 6 h（t1）,12 h（t2）,18 h（t3）,24 h（t4）after medication,Ricker Sedation-Agitation Scale（SAS）and Critical Care Pain Observation Tool（CPOT）score were compared between the two groups．The occurrence of adverse reactions was compared between the two groups．Results The onset of sedation,recovery after drug withdrawal,mechanical ventilation and ICU stay in the observation group were shorter than those in the control group,and the total dosage of propofol was lower than that in the control group（P<0.05）．At t1 to t4,CPOT score of observation group was lower than that of control group,and SAS score was higher than that of control group（P<0.05）．The fluctuation amplitude of HR and MAP in the observation group was smaller than that in the control group at T1,T2 and T3（P<0.05）．The total incidence of adverse reactions in the observation group was 10.17%,compared with 15.25% in the control group,the difference was not statistically significant（P>0.05）．Conclusions The combination of butorphanol and sufentanil in the treatment of patients with mechanical ventilation in ICU can effectively enhance sedation and analgesia,maintain hemodynamic stability,and have high safety,which is conducive to promote the outcome of the disease．