How to control the blood sugar of pregnant women need to refer to the patient’s condition, can be regulated by diet, exercise, and if necessary, need to be controlled by drugs under the guidance of a doctor. Patients with gestational diabetes mellitus or gestational diabetes mellitus need to actively control blood glucose during pregnancy to ensure the health of the mother and fetus. Pregnant women with elevated blood glucose can be intervened with diet and exercise. On the basis of ensuring balanced nutrition, control the intake of high-calorie and high-sugar food, and staple food is recommended to be roughly matched with small and thin food, and eat more meals with less food. Ensure safety by increasing exercise and avoiding sedentary activities. If the expected target of blood glucose cannot be achieved, insulin is needed to control blood glucose. It is recommended to start with a small dose, and gradually adjust the dosage according to the patient’s condition, pregnancy, and the specific level of blood glucose, and strive to control the pregnant woman’s blood glucose at a normal level. When pregnant women need to apply hypoglycemic drug treatment due to their condition, they should do so under the guidance of professional physicians to avoid adverse consequences. Pregnant women need to strengthen the daily monitoring of blood glucose.