Clinically, patients with gestational diabetes require strict glycemic compliance in order to reduce the occurrence of related complications and adverse pregnancy outcomes. The specific blood glucose requirements are as follows: 1) fasting blood glucose, fasting blood glucose is required to be controlled between 3.3-5.3mmol/L. 2) blood glucose one hour after meal is controlled below 7.8mmol/L. 3) blood glucose two hours after meal is controlled below 6.7mmol/L. 4) glycosylated hemoglobin is controlled below 6%, blood glucose control standards to ensure the safety of the fetus during pregnancy, in order to Reduce the risk of excessive amniotic fluid, premature birth, miscarriage, huge baby and difficult birth. For patients with gestational diabetes, strict monitoring of blood glucose should be done so that the blood glucose control can reach the standard.