Zhang Tianwei Plato said, "Thinking is the self-dialogue of the soul." Only when one thinks clearly can one speak clearly. Similarly, he can only write clearly if he thinks clearly. In argumentative writing, "dialectical thinking" is particularly important, which helps us to understand things rationally and analyze problems closely, thus enhancing the rigor of discussion. From the perspective of politics, dialectics is a philosophical theory about the unity of opposites, struggle and movement, universal connection and change and development. Everything in the world contains some philosophies: "The most colorful and fragrant flowers have thorns, and the bright ones take their beauty and make them not fragrant;" Those who are fragrant take their fragrance and make it unattractive; Those who are fragrant take their fragrant fragrance and make it prickly "shows that things have advantages and disadvantages;" "The fire at the city gate will hurt the fish in the pool" and "the lips are dead and the teeth are cold" tell us that things are interrelated and interdependent; "Misfortune comes from the mouth, and happiness comes from the mouth" indicates that things will develop in the opposite direction, which sublimates students' true feelings and provides students with a platform to show their beautiful feelings and hearts. A sincere letter reveals the child's gratitude, and a warm comment expresses the mother's touch. This teaching design turns the classroom of exercises into the classroom of life. This kind of composition teaching is real and can touch people's hearts. In the composition teaching class with the theme of "ode to maternal love", students are first guided to experience activities: sorting out articles, songs, pictures and other materials about praising maternal love; Tell your classmates the story of your mother or mother; Conduct a special interview: mother in the eyes of relatives or neighbors. Communicate in groups according to the information collected after class. Can look at pictures, read texts, sing mom's songs, and can.