Metabolic syndrome is a morbid condition that is related to many kinds of dysbolism, and is a critical factor for cardiovascular disease, which involves abnormal glucose tolerance, abnormal blood lipid,hypertension, obesity, hyperuricemia,hypercoagulability of blood, hypoplasminogenemia and microalbuminous urine, and it may finally induce angina pectoris, myocardiac infarction,sudden death, cerebral ischemia, cerebral apoplexy and intermittent claudication. As a syndrome not recorded in the ancient Chinese medical literatures,it is now threatening the human health in mod society. Exploration of the TCM etiology and pathogenesis of the syndrome may help us to have a better understanding, and is of active significance for prevention and treatment of the disease.