Abstract:Obstructive sleep apnea-hypopnea syndrome（OSAHS）is a sleep-disordered breathing characterized by the collapse of the upper airway，which is closely related to hypertension，coronary artery disease，arrhythmia，heart failure，stroke and other cardiovascular diseases. This article reviews the relationship between OSAHS and cardiovascular diseases from the aspects of disease epidemiology，pathophysiology，clinical diagnosis and evaluation，and treatment，summarizes and discusses the research progress and challenges of OSAHS and cardiovascular diseases.