Environmental factors are currently the main contributors to congenital heart disease in our children. There are several risk factors that have been confirmed to cause birth defects in newborns: mothers-to-be who are over 35 years old, those who have had viral infections in early pregnancy, especially rubella virus infections, and those who are deficient in some trace elements in early pregnancy, especially iodine and folic acid. Those who have been exposed to X-rays or harmful substances such as benzene, lead and mercury in early pregnancy, and those who have not used medication under the guidance of doctors in early pregnancy. Therefore, it is especially important to improve environmental factors and improve health care during pregnancy (especially in early pregnancy) to prevent the occurrence of congenital heart disease in children. (1) actively prevent rubella, influenza and other rubella viral diseases during pregnancy, especially in early pregnancy, eat more vegetables, take vitamin supplements, get pregnant at an appropriate age, do not use drugs casually, have regular prenatal checkups, and conduct glucose tolerance screening for pregnant women, etc.; (2) do not contact pets, because bacteria and microorganisms on pets may also cause congenital heart disease in children; (3) the living space of pregnant women should have fresh air and sufficient sunlight (3) The living space of pregnant women should have fresh air and sufficient sunlight, and exposure to radioactive substances is strictly prohibited, so as to avoid working and living in an environment with high air pollution; (4) Fresh vegetables should be soaked in water several times to reduce residual pesticides, and no smoking or drinking. In addition, if oral folic acid is taken in early pregnancy, it can effectively prevent neural tube malformation, while avoiding 35% of congenital heart disease and 15% of other malformations. Currently, most people believe that exposure to computers should be minimized in early pregnancy for frequent exposure. However, there is also a 10-year tracking survey that shows that the amount of electromagnetic radiation from computers is safe for humans, including pregnant women, and safe for sperm, eggs, fertilized eggs, embryos, and fetuses. In reality, individual computer operators miscarriage or birth of abnormal fetus is an accidental phenomenon, can not be “convicted” to the computer.