Data from the Global Burden of Disease Study 2021, recently published in the Lancet, show that ischaemic heart disease remains the first most common cause of death worldwide. Ischemic heart disease mainly refers to coronary artery stenosis or obstruction caused by coronary artery atherosclerosis leading to myocardial ischemia heart disease, called coronary heart disease. China Cardiovascular Health and Disease Report 2022 mentioned that coronary heart disease is an important cardiovascular disease affecting the health of Chinese residents, and its prevalence and mortality are on the rise. Coronary artery bypass grafting (CABG) and interventional therapy (PCI) are commonly used in the treatment of coronary heart disease. CABG surgery can significantly reduce the recurrence of angina pectoris, the incidence of acute myocardial infarction and improve the survival rate of patients, the patency rate of 5 years after mammary arterial bridge can reach more than 90%. Current guidelines and various RCT studies have shown that CABG is the gold standard for revascularization in patients with complex coronary artery disease. With the increasing aging of Chinese population, there are more and more cases of complex coronary artery diseases, and CABG, as the first choice for complex coronary artery diseases, will be more and more widely used in the foreseeable future. At present, the number of coronary artery bypass surgery is on the rise, about 50,000 cases per year. Traditional Chinese medicine can play a role in preventing complications, improving the quality of life and long-term curative effect of patients after CABG. It is particularly important to actively seek the treatment of integrated Chinese and Western medicine for patients after CABG. This study aims to explore the effectiveness and safety of Fuzheng Yangxin prescription in the treatment of Qi-Yin deficiency after CABG by means of a prospective cohort study, so as to determine the efficacy of Fuzheng Yangxin prescription on the recovery after CABG. To formulate a routine program of Chinese and Western combined therapy for postoperative rehabilitation of cardiac surgery, and actively promote the technology and program, promote the transformation of intellectual property rights, etc., and contribute to the formulation of relevant guidelines.