Self-efficacy was proposed by American psychologist Bandura in 1977.This paper explores the relationship between self-efficacy theory and children's language development,and proposes strategies to improve children’s self-efficacy in an all-round way,such as correcting adults’attitudes towards children’s language learning,paying attention to children’s individual language learning experience,playing a role of peer model demonstration,setting up the moderate difficulty of language learning task,and exerting children's self-efficacy in language learning in different types of language activities.