At present, there have been many cases of domestic blockchain + supply chain finance, but there are still many difficulties in solving the financing difficulties of SMEs. For example, many industries are scattered and flat, with their own chains, and the chain is very short (Internet companies). Many industries mainly use brains, have fewer orders, but have large amounts (consulting companies). On the other hand, introducing blockchain to supply chain finance will flaunt: reducing financing costs and improving financing efficiency. From a practical point of view, the trusted data based on the blockchain does allow the funder to improve the review efficiency, but the financing cost has not decreased much. The main reason is that in the current blockchain + supply chain financial system, there is no shortage of related business parties, and each party has its own profit pursuit.