The preferred medication for spontaneous angina is sublingual nitroglycerin, which effectively dilates the coronary arteries and prevents spasm. In case of spontaneous angina, in addition to sublingual nitroglycerin, high-flow oxygen inhalation is needed to keep the room quiet and the air circulating. The duration of angina pectoris and the symptoms of myocardial infarction should be clarified by ECG, cardiac ultrasound, coronary CTA and coronary angiography after going to the hospital. The next treatment plan through these, such as conservative treatment with medication, treatment with coronary stent implantation surgery and treatment with coronary open-heart bypass surgery, can relieve the symptoms of angina pectoris.