Most scholars believe that autism is related to genetic factors and is not preventable and does not require intervention during pregnancy. However, some scholars believe that autism is related to nutrition or exposure to toxic substances during pregnancy, as well as to the mother’s mood. It is important to minimize exposure to toxic and harmful substances during pregnancy. It is also important to pay attention to strengthening pregnancy nutrition during pregnancy, including folic acid-based multivitamin tablets, calcium tablets and DHA, which can promote fetal nerve cell development and help to prevent autism. The mother should also pay attention to the adjustment of her mind during pregnancy, and keep an optimistic attitude.