Abstract:    In the era of knowledge-based economy, it is of great significance for enterprises to strengthen the research of innovation network. Focusing on the current situation and trend of innovation networks research in China, taking databases of China National Knowledge Infrastructure (CNKI) and Chinese Social Sciences Citation Index (CSSCI) as literature sources, combing sample literature and applying bibliometrics methods such as knowledge graph analysis, burst term analysis, etc., this paper analyzes research status on trend of number of published papers, core authors, etc., contents and research trend of innovation network types, theoretical basis, etc. 
   In terms of the present research status, this paper focuses on the four aspects: the annual number of published papers, core authors, core journals and the highly cited literature. The conclusions of the research are as follows: (1) Innovation network research of China started early but achieved fruitful results. The annual number of published papers increases year by year in fluctuation; (2) It has formed four core research forces represented by the DANG Xinghua, ZENG Gang, LIU Xiaoyan and SUN Yonglei. Among them, cooperative network represented by DANG Xinghua focuses on in-depth research from the perspective of knowledge, network embedding and network governance, and the number of papers published is numerous and the papers are high-quality and the most representative; (3) The core CSSCI journals such as Science & Technology Progress and Policy, Science of Science and Management of S. & T., Studies in Science of Science, Science Research Management, etc. are core journals in this field. (4) Highly cited literatures mainly cover three aspects: cluster innovation network, innovation network attribute and innovation network theory, which are important research directions in the field of innovation network.
    In terms of research content, this paper focuses on research field, research topic, theoretical basis and research methods of innovation network. (1) It is found that seven kinds of networks, such as technological innovation network, regional innovation network, enterprise innovation network and cooperative innovation network, are the research focus of domestic scholars. These innovation networks are formed on the basis of different intentions and relationships, and have unique characteristics. (2) In addition to all kinds of innovation networks, synergy cooperation, knowledge resources and network evolution are the research topics that scholars focus on. The research results are abundant and the system is complete, but the research topics such as network governance, network faction, network anti-risk ability are less involved. (3) Network theory, resource dependence theory, resource-based theory and structural holes theory constitute the theoretical foundation of innovation network research. However, most domestic researches are application-oriented research, and there are few papers on theoretical development. Finally, most domestic researches are quantitative researches. There are few researches that combine qualitative analysis and quantitative analysis. Regression analysis is a commonly used method of quantitative data processing, while qualitative research mainly focuses on case research.
    In terms of research trends, this paper combs the research hotspots and evolutionary trends in this field by using key word burst analysis method, and finds that the researches on innovation networks in China have the characteristics of stages. Before the financial crisis, scholars mainly focused on technological innovation, enterprise innovation networks, industry clusters, cluster innovation networks and other aspects of research; Researches have become mature; and after the financial crisis, with the evolution of innovation network, researches on core enterprise, network structure, collaborative innovation network and evolutionary dynamics have become the focus of domestic scholars. In recent years, the knowledge power and collaborative innovation are the products of the knowledge-based economy era, which reflect the new characteristics of the innovation activities in the new era and will become a new research hotspot in this field.

Key words:  innovation network, knowledge map, research review