Yu Dafu's autobiographical novels were based on the author's own experiences, vividly depicting his own life experiences, thoughts, feelings and characters, showing the unique "autobiographical" literary form in modern Chinese literature. The following are some of the characteristics of Yu Dafu's autobiographical novels: Truthfulness: Yu Dafu described his growth experience, family life and social background from a true and credible perspective, allowing readers to feel the era and social atmosphere he lived in. 2. Unique narrative perspective: Yu Dafu used the first-person narrative method to directly narrate his own life experience and thoughts and feelings, making the novel have a strong personal color and subjective. 3. Rich emotions: Yu Dafu's novels are full of rich emotions, describing his own feelings and experiences of life, love, kinship, friendship, etc., showing the complexity and richness of human nature. 4. Vivid characters: Yu Dafu created many vivid characters through his own unique way of description, such as the character of the protagonist Lin Yutang, his emotional entanglement with his wife Wu Peifu, etc., which made the characters more real and vivid. 5. Reflection on human nature: Yu Dafu's novels not only describe his own life experience, but also deeply reflect on the nature of human nature and social problems. They explore the weakness of human nature and the root of social problems, which has profound social significance. Yu Dafu's autobiographical novels have become the classics of modern Chinese literature because of their authentic perspective, rich emotional descriptions, vivid characters and deep reflection on human nature.