Abstract Today, children’s literature is not excellent; the series of Harry Potter is a nice novel and a main work in children’s literature. From backgrounds, contents, reality meaning, the author points out the factors of Harry Potter’s success and makes more research, analyzes the influence of Harry Potter on children. J.K.Rowling, the author of Harry Potter, knows children clearly because she is a teacher. Through her point, children can be analyzed easily. Then, in order to understand children’s inner heart, the author analyzes what they think, and analyzes the factors of their characters being lost from three parts: school, household and society. Finally, the author calls for the close attention to children and the changes children themselves need.Key WordsHarry Potter; magic; moral; character