Angina pectoris is a series of symptoms caused by insufficient blood supply to the heart muscle due to narrowing of the coronary artery lumen. In the manifestation of angina pectoris, there is a tight, squeezing sensation behind the sternum and in the back, sometimes radiating to the roots of the teeth and the jaw, which can cause toothache and neuralgia in patients. Once this occurs, nitroglycerin or musk heart pills need to be administered sublingually immediately, and the pain will generally be rapidly environmental within 2-3 minutes. Once relieved, go to the hospital immediately for treatment. The degree of coronary artery lumen stenosis can be clarified by electrocardiogram, cardiac ultrasound, coronary CT, and coronary angiography. According to the degree of stenosis, the next treatment plan can be carried out, which can relieve the symptoms brought by angina and restore the patient’s health.