The recovery time of postpartum blood glucose varies in different cases. Most patients with gestational diabetes can return to normal blood glucose in 6-12 weeks after delivery, but in the case of combined diabetes pregnancy, blood glucose mostly cannot return to normal on its own after delivery. There are two types of high postpartum blood glucose: one is when the pregnancy occurs after the diagnosis of diabetes mellitus, which is called combined diabetes mellitus; the other is when the blood glucose value during pregnancy reaches the criteria for the diagnosis of diabetes mellitus, which is called gestational diabetes mellitus. Patients with combined diabetic pregnancy will still have abnormal blood glucose at 12 weeks after delivery, and need to be treated according to the treatment norms for diabetes. Postpartum abnormal blood glucose should pay attention to dietary regulation, eat more vegetables and fruits, while appropriate exercise can alleviate endocrine disorders and reduce the symptoms of hyperglycemia. In addition, it is recommended that patients with gestational diabetes should be screened for diabetes every 3 years after their postpartum blood glucose returns to normal.