Gestational diabetes is diabetes diagnosed by oral glucose tolerance test at 24-28 weeks of pregnancy. Gestational diabetes requires dietary and exercise therapy to ensure diabetes. When diet and exercise therapy are not effective, subcutaneous insulin injections are needed to control blood glucose. Patients with gestational diabetes mellitus should pay attention to the following points after delivery: 1. Continue to give dietary treatment for diabetes mellitus, advocate a diversified diet, and provide various nutrients needed after delivery. 2. Exercise appropriately, exercise can promote postpartum repair, promote calorie consumption, and also enhance insulin sensitivity. 3. Various insulin antagonist hormones secreted by the placenta decline rapidly after delivery. Patients with gestational diabetes may have normal or low blood glucose after delivery. They need to monitor blood glucose in time and reduce insulin dosage or even stop using it according to the degree of blood glucose elevation.4. Reassess the diagnosis of diabetes and adjust the treatment plan at 42 days after delivery.