Abstract: Based on the emerging financing model of supply chain finance, its financing characteristics and the key influencing factors of commercial bank loans, this paper comprehensively considers the optimal ratio of commercial bank income and cost, and builds a target planning model for SME loan pricing with the greatest benefit and the smallest cost. The Lagrange method is used to calculate the combination coefficient of the objective planning function; at the same time, in order to highlight the characteristics of supply chain finance and the advantages of full-chain loan credit, this paper introduces the reward and punishment mechanism of the supply chain operation as an adjustment factor for the supply chain finance model. Commercial bank loan pricing provides new ideas. This paper takes 940 sample enterprises from the equipment manufacturers listed in Shenzhen Stock Exchange as research objects for an empirical research. The research results show that the loan interest rate of risk-based enterprises is significantly higher than that of non-risk enterprises, and the supply chain financial loan pricing model can bring significant benefits to companies with better performance in supply chain. On the other hand, it can increase the loan interest rate of companies with poor performance in supply chain and obtain more risk compensation.

Key words: supply chain finance, loan pricing, revenue and cost dual goals, reward and punishment mechanism