Central bank loan refers to the general name of the funds that the central bank uses the base currency to finance from specialized banks and other financial institutions in various ways. It is an important aspect of the central bank's capital utilization, and it is also an important means for the central bank to implement monetary policy to control the total money supply. Central bank loan business is an important asset business of the central bank. Central bank loan is a high-energy currency, which is the basis of money supply and credit expansion in the whole society. The central bank influences the base currency through the use of refinancing funds, which in turn affects the money supply and credit scale, thus regulating the economy. Therefore, as the lender of last resort, the central bank has played an important role in maintaining the security of the financial system, curbing inflation, implementing monetary policy and promoting economic development. . Generally speaking, the increase in central bank loans is one of the signals that "monetary policy" will be relaxed; On the contrary, it is one of the signals that "monetary policy" is likely to tighten.