Not eating staple food at night is not good for the body, three meals a day should consume a certain amount of staple food, three meals should be regular, for diabetic patients, not to eat staple food at night. Night should consume a certain amount of staple food, starchy food is the common sense of the staple food, starch is a large molecule of polysaccharide polymerized by glucose molecules, the intake of a certain amount of staple food can elevate the body’s blood glucose level, to provide energy for the body, people in the dinner meal, the next day early in the morning before eating, the interval of more than ten hours, so the dinner should be intake of staple food. Dinner requires the intake of staple food in order to provide energy for the body at night, avoiding the danger of hypoglycemia that occurs when people are sleeping. In addition, for diabetic patients, it is more important to eat small meals, if diabetic patients use insulin or hypoglycemic drugs, but did not eat the main food at dinner, it will be more likely to hypoglycemic crisis than normal people.