Abstract: " Lu Xun atmosphere” is a topic worthy of further discussion in the interpretation of Lu Xun’s novels, through which can make " back to Lu Xun” more practical. Connect with " Lu Xun atmosphere” is Lu Xun’s " fiction language”. During the May 4th period, fiction serves as an intermediary between Lu Xun and his partners in the New Cultural Movement. The narrative feature of In the Restaurant is a daily story told by the protagonist to realize the dialogue between " I” and the protagonist, and to embed Lu Xun’s " fiction language” into the structure of the novel. Through the " intermediary” to achieve the dialogue between the author and the protagonist, which is not only the personality characteristics of Lu Xun’s polyphonic novel, but also the originality of his novel art.