To improve the current academic environment, in recent years, the Chinese authorities have issued a series of policy documents on academic journal construction, academic evaluation, scientific research evaluation and talent evaluation. Open science development strategies and operational platforms have flourished around the world, and scientific communication models and scientific research paradigms have undergone changes and transformations as a result. In the open science environment, academic journals, as important carriers of academic communication and an important part of academic communities, play an increasingly important role in the construction of disciplinary systems, academic systems and discourse systems. Chinese academic journals are an important position for interpreting Chinese practice, constructing Chinese theories, promoting Chinese schools of thought, and competing for and enhancing China’s international academic discourse. Meanwhile, in the open science environment, the transformation of scientific exchange and research paradigm urgently needs diversified and open scientific evaluation. This paper aims to enrich and improve the evaluation theory and index system of the discourse power of academic journals with Chinese characteristics, boost the construction of academic journals and the reform of quantitative evaluation mechanisms, and provide a reference for promoting the international discourse power of Chinese academic journals. Based on the theory of evaluation science, discourse power theory and communication theory, this paper discusses the basic issues of the discourse power evaluation of academic journals, integrates multi-source heterogeneous data, and adopts correlation analysis and integrated factor analysis, entropy weight method, TOPSIS method and two-dimensional mapping method to conduct empirical research from the perspectives of multi-factor, multi-indicator, multi-method fusion, comparison and evaluation. It defines the academic discourse power and the discourse power of academic journals. It is proposed that the discourse power of academic journals is composed of discourse influence and discourse leading. Discourse influence is composed of discourse influence ability and discourse power, and discourse leading is composed of news discourse, social media discourse, peer review discourse, encyclopedia discourse, video discourse and policy discourse leading. This paper explores the formation process of the discourse power of academic journals, constructs the discourse power evaluation model of Chinese academic journals in English. The results show that the research on discourse power evaluation of academic journals based on the theory, method and application logic is practical, comprehensive and reliable. Chinese academic journals influence and lead the ideology, academic terminology and academic vane of academic research, while being highly Chinese style, Chinese manner and Chinese characteristics. Chinese academic journals should serve as important spokespersons for Chinese academic discourse and contribute to accelerating the construction of the "three systems" and enhancing China’s international academic discourse.