Stable angina is a form of coronary heart disease, belonging to the chronic myocardial ischemia syndrome, with a clearer pathogenesis and typical clinical manifestations. The pathogenesis of stable angina pectoris is based on the fixed stenosis of the coronary arteries, under the effect of certain triggers, cardiac work suddenly increases, myocardial oxygen consumption also rises sharply, and the narrowed coronary arteries are unable to provide enough blood to meet the metabolic needs of the myocardium in a timely manner, resulting in myocardial ischemia, which causes angina pectoris symptoms. Stable angina has obvious triggers before the onset of angina, such as labor, emotional excitement, cold, after a full meal, etc. These triggers can cause recurrent angina attacks. The pain is mainly located in the precordial area or the back of the sternum, is pressure-like or constrictive, and lasts from a few minutes to more than ten minutes, usually not more than half an hour. Chest pain can be relieved quickly after the trigger is stopped, and sublingual nitroglycerin can also provide significant relief. Patients suffering from stable angina are advised to go to the hospital as soon as possible for timely and complete examinations such as echocardiogram, electrocardiogram, coronary angiogram, etc., and ask the professional doctor to evaluate the severity of the condition before deciding on a specific treatment plan.