Blood clots are the root cause of fatal cardiovascular diseases, such as cerebral infarction and heart attack, which seriously threaten human health and life. Therefore, it is crucial to prevent thrombosis before it happens. The main prevention of thrombosis is to adjust the lifestyle and drug prevention. 1.Adjustment of lifestyle: 1.Rational diet, light diet Advocate the middle-aged and elderly people to have a light, low-fat and low-salt diet, and eat more lean meat, fish, shrimp and other foods rich in unsaturated fatty acids in daily life. Second, more exercise, drink more water, reduce blood viscosity Exercise can effectively promote blood circulation and prevent blood clots. Drinking more water can also reduce blood viscosity, which can most simply prevent blood clots. People who travel long distance by airplane, train, car and other long-distance transportation must pay attention to move their legs more during the journey to avoid keeping a posture for a long time. For occupations that require long-term standing like airline passengers, it is recommended to wear elastic stockings to protect the blood vessels of the lower limbs. Third, quit smoking, smoking will damage the endothelial cells of blood vessels. Fourth, to maintain a good mood, to ensure good rest, to improve the body’s immunity 1, to ensure sufficient sleep every day: to maintain a positive and optimistic attitude and a happy mood, for the prevention of various diseases are very important. In addition, with the seasonal changes, timely increase and decrease clothing. The cerebral blood vessels of the elderly are prone to spasm in cold winter, which may induce thrombus dislodgement and cause cerebral thrombosis symptoms, so keeping warm in winter is very important for the elderly, especially for those with high-risk factors. 2, drug prevention: people with high risk of thrombosis can reasonably apply antiplatelet drugs and anticoagulant drugs after consulting a specialist. Active prevention of thrombosis is crucial, especially for people at high risk of thrombosis. It is recommended that people at high risk of thrombosis, such as some middle-aged and elderly people or people who have undergone surgical procedures and are at high risk of cardiovascular disease, should go to a hospital thrombosis and anticoagulation clinic or cardiovascular specialist for screening of thrombosis-related coagulation factor abnormalities and regular clinical testing for thrombosis, and take measures as soon as possible if lesions exist.