The Currency-counting machine is an electromechanical device that automatically counts the number of banknotes, usually with the identification function of counterfeit banknotes and the machine of counting and distinguishing the counterfeit banknotes. Due to the large amount of cash flow, the cashier desk cash processing work is heavy, the counting machine has become indispensable equipment. With the development of printing technology, photocopying technology and electronic scanning technology, the manufacturing level of counterfeit banknotes is getting higher and higher, and the discriminating performance of the counting machine must be constantly improved.