Objective:To explore influence of dexmedetomidine on Riker sedation -agitation scale (SAS) score and Ramsay sedation score in patients with hypertensive cerebral hemorrhage after borehole drainage . Methods :A total of 96 patients with hypertensive cerebral hemorrhage after borehole drainage treated in our hospital were selected . According to analgesic drugs taken after operation ,they were divided into dexmedetomidine group (n=48) and mid‐azolam group (n= 48) .Riker SAS score ,Ramsay sedation score and adverse reactions after operation were com‐pared between two groups . Results:Compared with midazolam group ,there were significant rise in Ramsay seda‐tion score [6h :(1.59 ± 0.52) scores vs .(2.13 ± 0.15) scores] and significant reduction in Riker SAS score [6h :(4.09 ± 0.82) scores vs .(3.73 ± 0.76) scores] on 6h ,12h and 24h after operation ,P<0.05 or <0.01 ;and signifi‐cant reduction in incidence rate of adverse reactions (37.5% vs .10.4% , P< 0.05 ) in dexmedetomidine group . Conclusion:Dexmedetomidine possesses definite analgesic and sedative effects on patients with hypertensive cerebral hemorrhage after borehole drainage ,it's safe andreliable ,which is worth extending .