Coronary artery dilation is a common complication of Kawasaki disease, and most patients have a combination of coronary artery dilation. Most coronary artery dilatation has a time frame, basically around 2 months, and coronary arteries generally do not dilate further beyond 2 months. The greatest risk of coronary artery dilation is the formation of thrombosis, which can complicate coronary artery disease. Therefore, the most critical monitoring point for coronary artery dilatation in Kawasaki disease is the presence of thrombus formation and the presence of symptoms such as chest tightness, chest pain, coronary artery disease and angina pectoris. In addition, prevention of thrombosis requires standardized use of antibacterial drugs, currently commonly used drugs are warfarin and dabigatran. The specific medication should be combined with the clinical situation and guided by the doctor’s interview.