Kong Yiji was a novel written by Lu Xun in 1918. The novel takes Kong Yiji, a poor man who has been living on the poverty line for a long time, as the protagonist. Through the description of Kong Yiji's life, experience and encounters, it reveals the various ills of Chinese society and the ugliness of human nature at that time, and shows the author's criticism of poverty and social injustice. The plot of the novel was relatively simple. It mainly talked about Kong Yiji who was sentenced for stealing books and eventually embarked on the path of crime and died tragically. Through Kong Yiji's life experience, the novel shows the dark side of Chinese society and the distortion of human nature at that time, revealing poverty, injustice and the ugliness of human nature. At the same time, the novel also shows the author's sympathy for poverty and injustice and kindness to human nature through the description of Kong Yiji. Kong Yiji is a classic of modern Chinese literature, which has a profound influence on Chinese literature and the world of thought. It revealed the dark side of Chinese society at that time in a simple and profound way. It showed the distortion and ugliness of human nature and became a classic work of modern Chinese literature.