Abstract: Hypertension is a chronic systemic disease, which is characterized by the increase of arterial pressure, and the predisposition to damage to the structure and function of target organs such as the heart, blood vessels of brain, the kidneys, eyes and peripheral blood vessels. In the past, the damage of the target organ caused by hypertension was limited to the change of retinal artery. With the development of detection technology, optical coherence tomography angiography (OCTA), a new detection technology of fundus oculi microcirculation, used to evaluate the retinal microcirculation has become a hot spot of research. OCTA has been gradually applied in the field of ophthalmology. Although the research on the microcirculation changes of retinopathy in hypertension and hypertension related diseases has just started, it can make more efficient, accurate and quantitative analysis and provide new ideas for the early diagnosis, early treatment and prevention of fundus oculi damage in hypertension.