Clinically, lung cancer combined with coronary artery disease can be broadly divided into two cases: 1. Previously diagnosed with coronary artery disease, having undergone coronary artery bypass or coronary artery stent, and now lung cancer is found. For such patients, detailed examination of both heart and lung cancer should be performed. Heart examination includes heart function and patency of coronary artery bridge or stent, while lung cancer examination mainly focuses on clear diagnosis and accurate staging. If lung cancer is early stage and can be treated surgically, the patient has good heart function and patency of coronary artery, in this case the patient can receive standard lung cancer surgery, but the protection of heart function and coronary artery should be enhanced. 2.Severe untreated coronary artery disease is found along with lung cancer. There are 3 kinds of treatment taken: (1) stent first and then lung surgery. For single branch lesion of coronary artery, anti-naked stent can be taken and standard lung cancer resection surgery is accepted after 2-4 weeks of anticoagulation therapy. Anticoagulation is required for 6 months after overlapping stents, which is not recommended in this case. The disadvantage is that in-stent thrombosis may occur, inducing severe heart attack. (2) Bypass first and then lung surgery. Coronary artery bypass surgery is performed first, and if the surgery goes well the patient recovers well and undergoes standard lung cancer resection surgery 2-4 weeks after the surgery. Disadvantages of two major surgeries in a short period of time, increasing patient pain and slow postoperative recovery. (3) Lung cancer resection and coronary artery bypass grafting are performed at the same time. In this century, due to the advancement of technology, especially with the application of non-stop coronary artery bypass technology, the risk and complications of coronary artery bypass surgery have been significantly reduced in avoiding extracorporeal circulation, and the risk of simultaneous bypass and lung cancer resection has been greatly reduced. In the current dilemma of high incidence of lung cancer, increasing number of patients with severe coronary artery disease, and insufficient clinical treatment measures, the new treatment can provide the best treatment plan for lung cancer and coronary artery disease in accordance with the clinical treatment routine, especially the simultaneous surgery can complete the radical resection of tumor and improve the heart function at the same time, which can prolong the life of patients and improve the quality of life, and is expected to provide a new way for the current clinical treatment dilemma. It is expected to provide a new pathway for the current clinical treatment dilemma. Simultaneous surgery can be used to complete lung cancer and heart surgery at the same time during one hospitalization with one anesthesia, which reduces the pain of second surgery and saves medical costs and resources, which is in line with the current trend of controlling the increase of medical costs and the importance of saving and environmental protection in the whole society.