Supply chain finance is widely used in logistics and financial industries. For the financial service structure of the supply chain, the credit risk assessment model was designed. Around the production and sales process of enterprises, enterprises that involve the financial supply chain were linked together, and the financial credit situation in the supply chain was analyzed as a whole. The starting point of this research is the construction of the mathematical model of the credit risk assessment of the international financial supply chain. Finally, the MILP linear rule method was used to evaluate the credit risk of the enterprise's financial supply chain.