Modular cash recognition device

The invention discloses a modular cash recognition device. The device comprises an upper box and a lower box which are movably integrally combined; a cash inlet and a cash outlet are respectively formed in the front side and the rear side and between the upper box and the lower box; a sensor for acquiring cash recognition information and a cash transmission wheel system for driving cash transmission are arranged between the cash inlet and the cash outlet between the upper box and the lower box; a guide opening, a mounting opening and a power data interface are formed in the side surface of the lower box, wherein the guide opening and the mounting opening are respectively corresponding to an upper guide column and a mounting shaft of a cash processing device; the power data interface is correspondingly connected with an inserting part on the cash processing device. The device is mounted to a cash receiver, a cash circulating machine and other cash processing devices by an inserting and drawing manner; when dismounting to maintain, the device can be mounted in and dismounted from the cash processing device conveniently, and therefore, the convenience of maintenance and replacement is ensured.