In patients with gestational diabetes, if simple blood glucose control is not up to standard, insulin is given to control blood glucose during hospitalization. The protocol used is three short and one long, which is preprandial menthol insulin and bedtime subcutaneous insulin injection to control blood glucose, while monitoring fasting blood glucose and postprandial blood glucose to bring blood glucose control up to standard. Fasting blood sugar is controlled below 5.3mmol/L, 1 hour after meal blood sugar is controlled below 7.8mmol/L, 2 hours after meal blood sugar is controlled below 6.7mmol/L, so that the purpose of hospitalization is achieved. For patients with gestational diabetes, if there is diabetic ketosis with positive urine ketone bodies, they need to be given supplemental energy and fluids during hospitalization, as well as small doses of insulin drip to eliminate ketones, and insulin is given to control blood glucose after ketone bodies are eliminated, and blood glucose is monitored at the same time to bring blood glucose control up to standard.