There is no definite answer as to how long a 70-year-old coronary artery disease patient can live. The natural life span of each individual cannot be predicted, and factors such as the degree of stenosis of his or her coronary artery, whether the plaque is stable, whether it is combined with heart failure, whether it is standardized treatment, and whether it is combined with other diseases all affect the natural life span, and there is no specific time statistic. The natural life span of a person varies in length and is influenced by many factors, such as genetics, environment, living standard, lifestyle, etc. The natural life span of each person cannot be predicted. If the patient has mild coronary artery stenosis, stable plaque, no symptoms such as heart failure, no combination of other diseases such as diabetes mellitus, hypertension, hyperuricemia, a healthy lifestyle such as a light diet, abstinence from smoking and alcohol, emotional stability, daily exercise, and standardized medication under the guidance of a doctor, it may not cause a significant reduction in natural life expectancy. On the contrary, it may affect the natural life expectancy, and there is no specific time statistics. When a 70-year-old man suffers from coronary heart disease, it is recommended to go to the hospital regularly for electrocardiogram and cardiac ultrasound review, and take medications such as aspirin enteric-coated tablets, metoprolol, atorvastatin, and isosorbide mononitrate under the guidance of a doctor in a reasonable manner, and go to the hospital in a timely manner if you are not feeling well or you feel that your condition is worsening.