Abstract:With the change of lifestyle and diet，obesity and overweight were prevalence caused by increased food intake，reduced energy expenditure and fat metabolism disorder.Obesity has become a public health problem in developing countries.The research about the anti-obesity food ingredients（such as diglycerides and conjugated linoleic acid）mechanism of action，develop anti-obesity functional food focused on decrease energy intake（such as lowering energy density of foods or reducing the food intake）or increasing energy expenditure（stimulation of thermogenesis）will become new food research and development focus.