the credit policy is a policy formulated by the central bank to guide the loan investment of financial institutions according to the national macroeconomic policy, industrial policy, regional economic development policy and investment policy, and in conjunction with fiscal policy and foreign capital utilization policy. The formulation of credit policy should follow the basic principle of supporting the superior and limiting the inferior, and its main goal is to improve the credit structure, promote the adjustment of economic structure, the progress of science and technology, and the optimal allocation of social resources.