We must seek complementarity on the basis of heterogeneity, and then achieve a certain totality, integrate the literature of different civilizations, integrate them, and explore the fusion of heterogeneous cultures and literatures. *identify literary phenomena and laws, and then construct a world-wide and global theoretical framework with greater explanatory power. Complementarity and integration among heterogeneous civilizations are the inevitable result of the logical development of cross-civilization research in comparative literature, and the inevitable result of comparative literature’s emphasis on heterogeneity research in the new development stage. For this complementation and integration between different literatures, cross-civilization research provides the following specific research methods: classification method, appendix method, citation method, mixed usage method and fusion method. The details are as follows:

Classification method: The method of classification is adopted in the comparative study of literature, that is, from the perspective of overall literature, the literary phenomena in heterogeneous civilizations are classified and summarized as Several theoretical issues are studied comparatively, and then a specific integration is achieved. Cao Shunqing's book "Comparative Poetics of China and the West" is a successful example of research using this method.

Appendix method: The famous Chinese scholar Wang Yuanhua’s "On the Creation of Literary Mind and Diaolong" typically adopts this method. This method, when studying literary issues of a certain civilization system, lists corresponding literary concepts in different cultural backgrounds that can be compared to this issue in the form of an "appendix" for comparative analysis. Through the "appendix method", the literary concepts of different civilization systems are presented together. In a broad perspective, the main text discusses specific issues in detail and in depth, and the contents listed in the appendix are comprehensive and clear. This provides us with a comparison of the literature of different civilizations. It provides convenience and helps us explore the most common literary laws at a higher level.

Citation method: The "citation method" used by Mr. Qian Zhongshu in "Tan Yi Lu" and "Guan Zhui Bian" is also an effective way for literature to study complementation and integration between heterogeneous civilizations. way. When studying literary theory, the "citation method" requires us to focus on the research of a certain literary theory, and in the research process, cite examples and theoretical discussions related to different civilization systems, so as to cite the relevant examples and theoretical discussions in heterogeneous civilizations. Literary theory integrated into one.

Mixed usage: bringing together various concepts, categories, terms, etc. from different literatures into one unified theoretical system. This method of heterogeneous integration opens up the "gap" between literature from different civilization systems. It integrates various literary concepts and theories into one system, regardless of ancient and modern times, China and foreign countries. Mr. Zhu Guangqian boldly tried this method in his "On Poetry".

Integration method: In "Aesthetic Walking", Zong Baihua integrates various art categories such as poetry, painting, calligraphy, music and architecture. Starting from the appreciation and analysis of specific works, he mixes Chinese and Western It also focuses on the analysis of the spirit of Chinese poetics, revealing the essential characteristics of literary and artistic aesthetic activities, and has also become an effective way to observe the complementarity and integration of heterogeneous civilizations.

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