本文认为，郑振铎对“五四”新文学运动的贡献是多方面的，在文艺理论上，他鼓吹为人生的艺术，坚持新文学的现实主义方向和使命感，是新文学运动最杰出的理论批评家之一。在文学启蒙上，他做了大量的开创性的工作。在对中外文学的研究中，他成功地构建了某种学术范式，具有很高的学术造诣。 This article argues that Zheng Zhenduo’s contributions to the May Fourth Movement are manifold. In the theory of literature and art, he advocated the art of life and upheld the realistic direction and mission of the new literature, which is the most outstanding theory in the New Literature Movement One of the critics. In literary enlightenment, he did a lot of groundbreaking work. In the study of Chinese and foreign literature, he succeeded in building a certain academic paradigm, with a high academic attainments.