Online literature had a great influence on children. Online literature was a new form of literature that was popular among readers through the Internet. Online literature not only provided more reading options, but it could also expand children's knowledge through reading online literature. Online literature usually contained rich storylines and characters to help children develop their imagination and creativity. Reading online literature could also improve children's language and writing skills and promote their thinking development. However, online literature could also have some negative effects. Some online literature works may contain inappropriate content such as violence, horror, and eroticism, which may affect children's mental health. Therefore, parents should help their children choose healthy online literature and educate their children on how to protect their mental health. Online literature can have a positive impact on children's reading level and thinking ability, but parents should help their children choose healthy online literature and educate their children on how to protect their mental health.