Objective To analyze the clinical characteristics of coronary artery bypass graft sur-gery for elderly patients over the age of 70 years. Methods The clinical data of 232 elderly patients ( age﹥70 years)who underwent coronary artery bypass graft surgery were collected for analysis,including 208 cases of simple coronary artery bypass graft surgery,11 cases of additional mitral valve replacement or annuloplasty,6 cases of additional aortic valve replacement,1 case of additional mitral and aortic valve re-placement,5 cases of additional mediastinal or pericardial tumor resection and 1 case of additional aneu-rysm resection. Results There were eight cases of postoperative respiratory failure,six cases of poor wound healing,4 cases of secondary exploration for postoperative bleeding,2 cases of perioperative myocar-dial infarction,1case of third-degree atrioventricular block and 1 cases of cardiac tamponade. Deaths oc-curred in 2 cases. Conclusion For elderly patients over the age of 70 years,overall effect of coronary ar-tery bypass graft surgery is satisfied. It can improve the quality of life and prolong survival time.