Obstructive sleep apnea syndrome(OSA) is an independent risk factor for hypertension. Because of it being ignored as the cause of hypertension,the patients with OSA-related hypertension are often missed and delayed. The cognition of OSA in patients with hypertension was surveyed by using the Sleep Apnea Cognitive Questionnaire for Patients with Hypertension. The concealment,clinical characteristics and pathogenesis of OSA-related hypertension were analyzed so as to explore its thought way of lowering blood pressure. It was suggested that the patients should postpone the choice of western medicine to directly lower the blood pressure after trying to adjust their life style to lower blood pressure and obtaining poor effect,and try to relieve the symptoms of OSA with Chinese medicine,meanwhile,the continuous positive airway pressure(CPAP) was used to improve the ventilation condition,thereby to regulate the blood pressure and recover the normal circadian rhythm of blood pressure.