Gestational diabetic patients do not necessarily need to be hospitalized if their diet and relative exercise control are good, but it is safer to be hospitalized if their blood sugar control is very poor and they need to receive insulin therapy. Considering the late stage of pregnancy, if the hospital admission is early at 39 weeks, it is afraid that the pregnant woman will have ketoacidosis when her blood sugar is very high at the time of delivery, which will be dangerous to the mother and fetus. If the blood glucose control is stable and the parameters of amniotic fluid are satisfactory, hospitalization is not necessary. On the contrary, hospitalization is needed for observation, and if necessary, labor should be induced in the obstetrics and gynecology department. Failure to control blood sugar in time may leave sequelae, such as neonatal respiratory distress and various sequelae, which need more attention from pregnant mothers.