Cardiovascular and cerebrovascular diseases have brought an important burden to the public health system. Due to age and other factors, the elderly are relatively more likely to suffer from Cardiovascular and Cerebrovascular Diseases (CVD). For the elderly, CVD risk factors are very diverse, mainly hypertension, obesity, diabetes and lack of physical activity. This article aims to start with the pathological and physiological connections between these factors and elderly CVD, explain the pathological and physiological processes of elderly CVD and how some pathological reactions gradually deteriorate into CVD, and connect these pathological reactions and risk factors with CVD, further explore the relationship between them, clarify the mechanism of physical activity improving the cardiovascular and cerebrovascular system in elderly people, and start from the perspective of physical activity prevention, Elaborate on the role and effectiveness of three different types of physical activity in preventing CVD, improve the health status of the elderly, and provide new ideas for exercise prevention and treatment of CVD.