Abstract: Supply chain network is an important social network for enterprises, which has an important impact on promoting the overall coordinated development of supply chain. Taking China’ A-share listed enterprises from 2012 to 2022 as the research samples, this paper explores the influence of business supply chain network relationship on their commercial credit supply and its acting mechanism from the perspective of structure hole. The results show that enterprises with rich supply chain network structure holes can significantly improve the supply of commercial credit and optimize the structure of commercial credit supply. This is because enterprises occupying the position of supply chain network structural holes can ease financing constraints to enhance the supply capacity of business credit, and enhance the risk-taking ability of enterprises to enhance supply willingness, thus improving the supply of commercial credit. Among the enterprises in regions with lower economic policy uncertainty and higher marketization process, the enterprises with better supply chain stability and closer geographical distance of supply chain, as well as the non-state-owned enterprises and the enterprises at growth stage, occupying the position of abundant supply chain network structure holes has a more significant impact on their commercial credit supply. Therefore, enterprises should attach importance to the embedded supply chain network relationship, make rational decisions of commercial credit supply, build a cooperative and win-win supply chain system, and promote the coordinated development of supply chain.

Key words: supply chain network, structure hole, trade credit supply, structure of trade credit