People with coronary heart disease can swim appropriately, swimming belongs to aerobic exercise, aerobic exercise usually refers to the large muscle groups involved in the exercise, mainly aerobic function, sustained exercise time of at least a few minutes to improve the oxygen intake of the cardiopulmonary metabolic system. Patients with coronary heart disease need to be given secondary prevention medication for coronary heart disease based on lifestyle improvement, lifestyle improvement, including a low salt, low fat diet, but also to participate in appropriate exercise, exercise should be mainly aerobic exercise. Swimming is one of the best forms of aerobic exercise, so patients with coronary artery disease can be properly treated with aerobic exercise rehabilitation such as swimming. Aerobic exercise rehabilitation therapy can effectively improve the cardiac function of patients with coronary heart disease, increase their exercise endurance and reduce the incidence of acute coronary events.