Abstract: Guar gum is a soluble dietary fiber which had been extracted from India bean guar. It had been used in food industry as food additives since been introduced into China in 1990s. In recent years, it has been reported that guar gum could play a very good role of adjuvant regulation on hyperlipemia. It can inhibit cholesterol absorption in the intestine, obstruction the absorption of bile acid into the enterohepatic circulation, leading to discharge of bile acids and sterols. On the other hand, guar gum can enhance the activity of HMG-COA reeducate and decrease glucose uptake thus indirectly decrease the synthesis of hepatic cholesterol. In this paper, guar gum’s hypolipidemic effect and its possible mechanism to refer for scientific utilization of guar gum was reviewed. The content of the article include structure, physicochemical properties, function application, hypolipidemic effect and mechanism.