Aspirin is pharmacologically classified as an antipyretic, analgesic and anti-inflammatory drug, with antipyretic, analgesic, anti-inflammatory and anti-rheumatic effects, as well as anti-platelet and anti-thrombotic effects. The medicinal effects of aspirin are closely related to the applied dose: small doses of 75-150mg/d can be anti-platelet and anti-thrombotic, mainly used for cardiovascular and cerebrovascular ischemic diseases, such as coronary heart disease and cerebral infarction; deep vein thrombosis, post-surgical thrombosis and other thrombotic diseases. Medium-dose aspirin, 0.3-0.6g each time, 3 times a day, is mainly used to reduce fever and relieve pain. High-dose aspirin, 3-6g/d, is used for anti-inflammatory, anti-rheumatic and treatment of arthritis, which can be used for rheumatic fever and rheumatoid arthritis, and also for rheumatoid arthritis, osteoarthritis and ankylosing spondylitis, although it is rarely used nowadays. In addition, aspirin is also used to treat Kawasaki disease in children. Currently, aspirin is mainly used clinically for antiplatelet and antithrombotic purposes.