When a diabetic patient is pregnant, the glucose in the blood not only needs to supply her own needs, but also needs to ensure the growth and development of the fetus, so the maternal blood glucose utilization increases, so its dietary management requirements are different from other types of diabetes. The principle of dietary treatment is to ensure the nutritional requirements of the pregnant woman and the fetus, but also to effectively control high blood glucose in order to guarantee the normal growth and development of the fetus. Due to the special nature of pregnancy, the dietary management of diabetic women during pregnancy is not as strictly controlled as that of other diabetic patients, and can be appropriately relaxed. Generally, it is increased by 20%-30% on the basis of the dietary control of other types of diabetic patients, and the principle is to ensure that the weight gain during regular pregnancy does not exceed 9 kg. Weight gain should not be too rapid, but generally ensure an increase of 1-2 kg per month is sufficient. In the second trimester of pregnancy, the rate of weight gain can be accelerated to about 0.5 kg per week. If you experience excessive weight gain, constant weight or weight loss during pregnancy, you should consult your doctor in order to adjust your diet. There are three stages of pregnancy: the first stage of pregnancy, i.e. the first 3 months of pregnancy; the second stage of pregnancy, 4-6 months; and the third stage of pregnancy, 7-9 months. In the first stage of pregnancy, the fetus is developing neurologically, if the blood sugar is poorly controlled, the fetus will easily develop into malformation, plus the fetus needs less energy, so the diet still needs to be strictly controlled, but it is not easy to control too low. After entering the second stage, due to the rapid growth and development of the fetus, the demand for caloric energy increases significantly, and the total daily caloric energy requirement can be supplied at 30-40 kcal per kg of standard body weight before pregnancy. For obese diabetic women, weight loss is prohibited during pregnancy, but necessary adjustment of caloric energy can be made according to the weight gain of pregnant women. The total daily caloric energy during the third trimester is controlled at 1800-2200 kcal. The amount of carbohydrates eaten during this period should not be too small, otherwise it is not conducive to fetal growth and development, and the daily staple food should not be less than 300 grams, some even 400 grams, accounting for about 50-60% of the total calories. In diabetes, protein metabolism is abnormal, protein decomposition increases, nitrogen loss increases, and secondly, to meet the needs of pregnant women and fetal growth and development, so protein supply should be increased compared with normal pregnant women. The Chinese Nutrition Society recommends that the protein supply should be increased by 15 grams in the second trimester and 25 grams in the third trimester, or 1.5-2.0 grams per kilogram of body weight, and 100-110 grams per day is appropriate. Protein supply accounts for about 20-25% of total calories, of which high-quality protein accounts for at least 1/3. Fat supply accounts for about 20% of the total calories.