Abstract: This paper uses canonical correlation analysis method to analyses input and output variables in the banking of China, the result indicates that overhead rather than capital is the most important input element for production growth of banking in China while the other important element is labor. Total income and amount of loan (rather than the amount of profit) are the most remarkable output variables. Then, the paper uses variabies which were filered in the canonical correlation to structure production function of the banking of our country. The result indicates, the production growth for banking in China depends mainly on the increasing of inputs(overhead and labor, especially the former), the effect of technological progress is very faint, the way of growth is extensive. Furthermore the utilization of resources of state-run banks has the lowest efficiency, the elasticity of labor for income is negative, and the time lag of input and output for production is relatively obvious.