Abstract: With the advocacy of green development by the government, many enterprises try to achieve green transformation by investing in green technology, but they often face financial constraints. Therefore, banks introduce different green credit financing modes to help enterprises to finance. First, this paper analyzes the green credit financing model with the fixed interest rate for the manufacturer considering corporate social responsibility as the benchmark model. It is found that both green credit and corporate social responsibility can enhance the green level of the product, while they play a mutually reinforcing role. Therefore, in implementing the green credit policy, the government can encourage enterprises to fulfill corporate social responsibility, thereby realizing better environmental benefits. Then, this paper develops a green credit financing model with the floating interest rate related to the green level. It is found that when the cost coefficient of green research and development (R&D) is larger (small), manufacturers will choose the fixed (floating) interest financing mode. When the cost coefficient of green R&D is larger (small), the floating rate has a negative (positive) effect on the green level of the product. Green access criteria can eliminate the negative effect of floating interest rates on the green level of the product when the cost coefficient of green R&D is large. Therefore, when banks implement the floating rate financing model, they should set appropriate access criteria to enhance the effectiveness of the floating rate model. Finally, the financing model of joint decision-making on the green level for banks and manufacturers is analyzed. It is found that the mode of joint decision would increase the green level of the product and the utility of the whole system while reducing the utility of the manufacturer.

Key words: green access criteria, green credit financing, green supply chain, corporate social responsibility, floating interest rate 

摘要： 随着政府大力推动绿色发展，众多企业试图通过投资绿色技术实现绿色转型，却普遍面临资金约束。为此，银行推出多种绿色信贷融资模式以协助企业融资。以企业社会责任制造商的固定利率绿色信贷融资模型为基准分析表明，绿色信贷与企业社会责任共同促进产品的绿色水平并相互提升，且二者存在协同增强效应；政府实施绿色信贷政策可激励企业履行社会责任，从而提升环境效益。进一步构建与绿色水平相关联的浮动利率绿色信贷融资模型，分析发现：当绿色研发成本系数较大（小）时，制造商更倾向于选择固定（浮动）利率融资模式；当绿色研发成本系数较大（小）时，浮动利率对产品绿色水平具有负向（正向）作用；在绿色研发成本系数较大的情况下，引入绿色准入标准可消除浮动利率对产品绿色水平的负面影响，因此，银行在推行浮动利率融资模式时需设置合理的准入标准，以优化实施效果。最后，银行与制造商联合决策绿色水平的融资模式虽能提高产品绿色水平及系统整体效用，但会降低制造商的效用。

关键词: 绿色准入标准, 绿色信贷融资, 绿色供应链, 企业社会责任, 浮动利率