Among the clinical indicators, elevated HDL is a good clinical phenomenon, elevated is one of the clinical coronary protection factors and prevents and delays the process of atherosclerosis development. HDL plays a physiological role as a carrier of cholesterol from extrahepatic tissues to the liver, thus preventing the deposition of free cholesterol on the cells of extrahepatic tissues. HDL is an important reference for the clinical diagnosis of coronary heart disease, transporting cholesterol from surrounding tissues, which is then converted to bile acids or excreted directly from the intestine through bile. Arteriography has demonstrated a significant negative relationship between the amount of HDL cholesterol and the degree of arterial lumen narrowing.