The loan interest rate is the interest rate charged by banks and other financial institutions to borrowers when borrowing money. It is mainly divided into three categories: the loan interest rate of the central bank to commercial banks; The loan interest rate of commercial banks to customers; Interbank Offered Rate Bank loan interest rate refers to the ratio of interest amount to principal amount during the loan period. The People's Bank of China uniformly manages the interest rate in China. The bank loan interest rate refers to the benchmark interest rate set by the People's Bank of China, and the actual contract interest rate can fluctuate within a certain range. The loan interest rate refers to the ratio of interest amount to principal amount during the loan period. The interest rate of loan contracts signed with banks and other financial institutions as lenders is fixed, and the parties can only negotiate within the upper and lower limits of interest rates stipulated by the Bank of China. If the loan interest rate is high, the repayment amount of the borrower will increase after the loan term, and vice versa.