There is a complex phenomenon of mutual infiltration between Zang Kejia’s new poetry and old-style poetry, which is both ‘mutual learning’ and ‘mutual integration’. ‘Mutual learning’ is mainly reflected in the fact that the new poetry absorbs the characteristics of the old style poetry, which is concise and implicit. The old style poetry also learns the advatages of the new poetry, which is colloquial and clear. ‘Mutual intertation’ is mainly manifested in the identity and convergence of them writing and image selection between new poetry and old style poetry, as well as the consistency of their inner spirit. It is of great significance in literary history to study this special phenomenon. On the one hand, it enables us to have a more comprehensive and profound understanding of Zang Kejia's poetic ideas and explore its multiple poetic values. On the other hand, this phenomenon shows that Chinese literature in the 20th century is the key period for the replacement of new literature and old literature. The new and old literature in this period resisted and integrated with each other. Therefore, the study of this sector can promote the mutual penetration and integration of Chinese New Literature and Old-style Literature in the 20th century.