Diet therapy is the basic therapy of diabetes, is the premise of all treatment methods, applicable to all types of diabetic patients, only good dietary control, oral hypoglycemic drugs or insulin can play a good curative effect, diet therapy needs to pay attention to the following points: 1, according to the condition at any time to adjust, flexible control, lean patients can be appropriately relaxed to ensure the total calories, obese patients must strictly control the diet, to low-calorie, low-fat diet For patients treated with insulin should pay attention to the discretion of 9-10 am, 3-4 pm or before bedtime to add meals to prevent hypoglycemia; 2, the formulation of diet therapy should be scientific and reasonable, not too much and less than, that is, not subjective arbitrary nor restrictive too strict, such as some diabetic patients a little carbohydrates are afraid to eat, but aggravate the disease, and even ketosis, should be based on their own condition 3, many patients have long-established dietary habits are not easy to change, including the type of food, eating time, the amount of each meal distribution, etc., to take care of the original diet as far as possible, do not make big changes, otherwise it is difficult to adhere to long-term, but also as far as possible to correct bad eating habits.