Although diabetes should limit the intake of sugar, but not that absolutely can not eat sugar, such as maltose, fructose such sugar can be eaten, because such sugar is not glucose, eaten into the body, although the body can be quickly digested, but will not have a very obvious effect on blood sugar. It must be noted that although such sugars as maltose and fructose will not significantly increase blood glucose, but as a carbohydrate itself contains calories, eating these sugars will increase the energy intake, which is detrimental to the control of energy for diabetic patients, therefore, from the perspective of the diabetic diet as far as possible to eat less sugar, as far as possible, the use of unsaturated fatty acids or proteins to provide energy, so that the patients of the whole nutritional structure will be more healthy. The whole nutritional structure will be more healthy, which is more meaningful for the control of the disease and the prevention of complications.