Maintain the calories and nutrients for pregnancy without causing postprandial hyperglycemia. The calorie requirement for pregnant women with diabetes in early pregnancy is the same as before pregnancy. After mid-pregnancy, the calories will be increased by 3% to 8% for each additional week of pregnancy, and vitamins, calcium and iron should be supplemented, and salt intake should be appropriately restricted to control the blood sugar to normal level and the pregnant woman does not feel hungry as the ideal, otherwise, drug treatment should be increased. Blood glucose control standard: blood glucose value ≤5.6mmol/L at 0:00 and before three meals, ≤7.8mmol/L one hour after three meals, ≤6.7mmol/L two hours after three meals.