Research on Green-credit Policy of Commercial Bank Based on Evolutionary Game Theory and DID Model

green-credit policy is one of the important channels for the conversation and development of environmental protection, it is also the main direction for Chinese commercial bank to implement reform and development, which arises high attention from all sectors of community. This paper is based on evolutionary game theory to discuss the factors of affecting green-credit policy implemented by commercial bank. It uses DID model to implement demonstration data analysis, learn its effect on performance of commercial bank. Results indicate that increasing green-credit policy revenue, reducing cost, strengthening the punishment cost without implementing green-credit policy can effectively promote the initiative of commercial bank to implement green-credit policy. Although the current effect is not so obvious, green-credit policy of commercial bank will bring plenty of advantages with the policy improvement and time progress, we should continually implement green-credit policy.