Autism spectrum disorder (ASD) is a neurodevelopmental disorder, and its prevalence has been increasing during the recent years, which has posed a great impact on the families of the patients and society. Epidemiological studies have found that environmental exposure factors have an important impact on the occurrence and development of ASD, including pesticides, heavy metals, poly- and perfluoroalkyl substances, phenols, and air pollution. This paper focused on the relationship between environmental exposure to the above mentioned typical environmental exposure factors and the occurrence of ASD, in order to provide reference for related research of ASD.
