Chain loan is a kind of supply chain finance business. By comprehensively judging the financial status, industrial chain status, transaction status, willingness to pay and ability to pay of the core enterprises, we can provide an overall solution for the whole process of order financing for small and medium-sized enterprises in the supply chain. The goal of nuclear chain loan is to help suppliers solve the problem of capital turnover and provide financial support, so that they can fulfill orders on time and promote the stable operation of the whole supply chain. Supply chain finance, as a business type, can improve the financing convenience of suppliers and the efficiency of obtaining funds, and reduce the complexity and time cost of traditional financial links. Exposing chain loans has played an active role in promoting the development of supply chain finance and supporting the economic growth of small and medium-sized enterprises.