The normal value of blood glucose in children is between 3.9-6.1mmol/L. Children’s blood glucose is mainly measured by fasting blood glucose, and if the fasting blood glucose is between 3.9-6.1mmol/L, it belongs to the normal range. If it is significantly lower or higher, it is abnormal and should be treated promptly. First of all, if the blood glucose is obviously low, it is mainly caused by the children’s insufficient energy intake, and the children need to be supplemented with glucose in time. If the child’s blood sugar is obviously high, mainly due to diabetes, then insulin or metformin and other drugs should be used to lower blood sugar.