Hyperglycemia in pregnant women can affect the health of the fetus, which may lead to cardiopulmonary dysplasia, hypoglycemia, malformations, etc. in newborns, but not all newborns will suffer from such conditions. Before the fetus is born, the degree of its affected and pregnant women individual differences, mental state, nutritional status and other factors related to a combination of factors, can not be generalized, but in general, high blood sugar pregnant women give birth to children whose risk of health hazards than normal pregnant women to be higher. 1, cardiorespiratory dysplasia: pregnant women with high blood glucose will have an impact on the growth and development of the neonate, in particular on the cardiorespiratory development of the largest impact, may cause Newborn congenital heart disease, low lung function, etc., easily lead to fetal respiratory distress after birth; 2, hypoglycemia: high blood sugar during pregnancy will make the fetus in a state of long-term hyperglycemia, and the fetus will be prone to hypoglycemic reaction after birth when it leaves the mother’s body; 3, other: pregnant women’s high blood sugar may also increase the risk of neonatal malformation. Once found that pregnant women with high blood sugar, should be timely control of blood sugar, to develop the right habits, regulate diet, if the effect is not good need to timely injection of insulin, in order to control blood sugar during pregnancy. Secondly, if a pregnant woman has high blood sugar, after giving birth to a child, she must pay attention to the examination to see whether the child’s growth and development is normal, and if there is any abnormality, she should bring the child to the hospital in time to deal with it.