Lu Xun's Madman's Diary was regarded as a classic work of modern Chinese novels, which created the "Madman's novel" model of modern novels. Through the confession and dialogue of a madman, this novel reveals the various ills of Chinese society and the distortion of human nature. The novel presents the absurdity and cruelty of feudal ethics with extreme exaggeration, revealing the dark side of human nature, which has profound social significance and philosophical value. A Madman's Diary was hailed as a milestone in modern Chinese literature and had a profound impact on the development of modern Chinese literature and thought.