21 patients with obstructive sleep apnea-hypopnea syndrome(OSAHS)and hypertension were treated by orthodontic applince for 3 months.All complains of snore were alleviated or disappeared during sleep,the short of breath and drowsy in the daytime were disap-peared,AHI decreased(P<0.01)and the lowest SaO2 increased(P<0.01).The blood pressure tend to normal.The orthodontic appliance can effectively control OSAHS and hypertension.