Education informatization has promoted the innovation of children’s sports, and the development of AI technology has brought opportunities and challenges to the implementation of children’s extra-curricular sports activities. The paper studies the development of AI technology in children’s extra-curricular sports activities by using the method of literature and systematic combing, and finds that: AI technology can promote home co-parenting, explore the nature of children’s sports, evaluate children’s participation in sports activities, and predict the direction of children’s sports development constitute the mechanism of AI technology to promote the implementation of children’s extra-curricular sports activities. At the same time, with the continuous development of children’s extra-curricular sports activities, its advanced pattern is mainly manifested in three aspects: AI technology enables children’s extra-curricular sports activities, innovates the participation path of extra-curricular sports activities, and reconstructs the content of extra-curricular sports activities for children. In order to realize the implementation of AI technology to promote children’s extra-curricular sports activities, the key is to improve the information literacy of preschool teachers, innovate the key elements of the development of children’s sports, reconstruct the development blueprint of AI technology in children’s extra-curricular sports activities, and promote the development of children’s intelligent sports.