Metabolic syndrome refers to a group of syndromes including obesity, hypertension, hyperglycemia, hyperuricemia, and hyperlipidemia as the main manifestations. Specifically, it is a complex group of metabolic disorder syndrome, which is a risk factor for cardiovascular disease of diabetes. The prevalence of metabolic syndrome is 58.1% in the age group of 60 years and above, and the prevalence is higher in the northern population than in the southern population with increasing age, combined with the latest guidelines, this article introduces metabolic syndrome in detail. I. Diagnostic criteria for metabolic syndrome? The diagnosis can be made with three or more of the following: ① overweight and/or obese BMI ≥ 25; ② hypertension systolic/diastolic blood pressure ≥ 140/90 mmHg, and/or diagnosed and treated hypertension. (3) dyslipidemia: fasting triglycerides ≥ 1.7 mmol/L, fasting HDL-C < 1.04 mmol/L, and/or diagnosed dyslipidemia and treated with medication; (4) hyperglycemia: fasting glucose ≥ 6.1 mmol/L or glucose ≥ 7.8 mmol/L 2 hours after sugar load, and/or diagnosed and treated with diabetes mellitus. Among the components of the metabolic syndrome, combined hypertension was the most common in our patients (65.4%), followed by dyslipidemia (53.6% hypertriglyceridemia in men and 49.4% hypoHDL-Cemia in women). Second, the relationship between metabolic syndrome and cardiovascular disease? Metabolic syndrome is an important risk factor for cardiovascular disease. Studies in Chinese population show that compared with non-metabolic syndrome patients, the 10-year risk of cardiovascular disease increases 1.85 times in metabolic syndrome patients, and the risk of ischemic and hemorrhagic stroke increases 2.41 and 1.63 times, respectively. Among the types of metabolic syndrome, those with abdominal obesity combined with hypertension and low HDL-C have the highest cardiovascular risk (5.25-fold increase), and if hyperglycemia is combined with the above combination, the risk of cerebrovascular disease increases 16.58-fold. Three, metabolic syndrome treatment principles and methods? The principle of treatment for this disease is early intervention and comprehensive attainment to reduce cardiovascular risk and prevent target organ damage such as heart, brain and kidney. Lifestyle changes are essential to manage the potential risk factors of metabolic syndrome. Such as reducing energy intake, increasing physical activity, quitting smoking and limiting alcohol and changing sedentary lifestyle are effective ways to prevent and improve metabolic syndrome. For those who fail to adequately reduce disease risk factors due to preventive measures and lifestyle changes, pharmacological treatment should be considered. Treatment of metabolic syndrome is mainly achieved by reducing the risk of cardiovascular disease through the use of appropriate medications to reduce specific clinical risk factors, such as lowering blood glucose, lipids and hypertensive drugs, and there are no accepted methods and medications to improve and treat metabolic syndrome comprehensively.