The control of blood sugar in gestational diabetes mainly involves monitoring fasting blood glucose, postprandial blood glucose, and ketone bodies in urine. Patients can monitor their fasting and postprandial blood glucose 4-6 times daily. The target for blood sugar control is to maintain fasting blood glucose, pre-meal, or pre-sleep blood glucose levels between 3.3 to 5.3 mmol/L, postprandial blood glucose after one hour should be less than or equal to 7.8 mmol/L, and postprandial blood glucose after two hours should be less than or equal to 6.7 mmol/L. Ketone bodies should be negative, and glycated hemoglobin should be controlled below 6%. Only by meeting these standards can the control of blood sugar in gestational diabetes be considered adequate, which can reduce risk factors for both the mother and the fetus.