In the 1930s during the historical advancement of the Sinicization of Marxist Literary Theory,the “popularization of literature and art” movement advocated by the “Left League” in the 1930s explored ways to realize the popularization of literature and art from the aspects of the form and content of literature and art, the position of writers, community organizations and practical functions, which promoted the development of the Sinicization of Marxist literary theory, and in the specific context of China, it promotes the breeding of Marxist discourse form of “people's nature of literature and art”. The “popularization of literature and art” in the 1930s also showed the difficult exploration process of the Sinicization of Marxist literary theory in the breakthrough of literature and art, and reflected the pursuit of the systematic and theoretical consensus strategy of the Sinicization of Marxist literary theory. However, due to the incomplete theoretical debate and other factors, different opinions on the expression of discourse were affected. The “popularization of literature and art” in the 1930s, however, still has a positive theoretical value for the historical advancement of the Sinicization of Marxist literary theory in terms of the history of ideological trends and theoretical history thanks to its gestation of utterance in the “people of literature and art”.