Promote the increase, expansion and price reduction of loans for small and micro enterprises. Small and medium-sized banks are not only an important part of China's banking system, but also rooted at the grassroots level and are inherently inclusive, playing an indispensable role in serving grassroots residents, small and medium-sized enterprises, individual industrial and commercial households and other fields. The research significance of small and medium-sized banks supporting the development of small and micro enterprises lies in promoting the increase, expansion and decline of loans for small and micro enterprises. Small and micro enterprises are important engines and driving forces of national economic development.