Aspirin is an antiplatelet drug, mainly used to prevent and control the formation of arterial thrombosis, and is a cornerstone drug for primary and secondary prevention of ischemic cardiovascular disease. The indications are mainly as follows: i. Aspirin can be taken by patients with three or more of the following, such as hypertension, hyperlipidemia, diabetes mellitus, family history of the above diseases, smoking, and age >50 years. Second, patients with hypertension accompanied by one of the following can take aspirin, such as diabetes, age greater than 50 years, patients with hypertensive target organ damage. Third, patients with cardiovascular events in the next 10 years with a risk level greater than 10%, accompanied by two of the following can take aspirin, such as hypertension, hyperlipidemia, diabetes, obesity, lack of exercise and other patients whose risk level should be assessed by a specialist and made. Fourth, diabetic patients older than 50 years old for men or 60 years old for women, with one of the following can take aspirin, such as patients with family history of diabetes, hypertension, smoking, hyperlipidemia, proteinuria. Since aspirin can have different degrees of adverse reactions when taken for a long time, it should be taken with strict indications and not abused blindly. In addition, aspirin is an antipyretic and analgesic drug, which can be used for fever, pain and rheumatoid arthritis.