Card retaining self-service recovery system

The utility model discloses a card retaining self-service recovery system, and relates to the technical field of an automatic teller machine for plug-in cards. By the aid of the system, a user can get back a retained card conveniently and quickly with the help of fingerprint information or card number information through the automatic teller machine. The card retaining self-service recovery system comprises a machine cabinet and a main card reader which is fixed on the machine cabinet. The card retaining self-service recovery system further comprises a controller, a comparator and a storer. A first air cylinder is fixedly mounted in the machine cabinet, a rectangular block is fixedly connected to the front end of a first telescopic rod of the first air cylinder, the four corners of the rectangular block are each fixedly provided with a roller with a gear, a chain is connected to the four rollers in rotating and tight sleeving modes, the chain is fixedly connected with a belt in a tight sleeving mode, a plurality of clamping grooves are formed in the outer surface of the belt, and a fingerprint device is arranged on the machine cabinet. The fingerprint device, the comparator, the storer, the control end of the main card reader, the control end of the first air cylinder and the control end of a first stepping motor are electrically connected with the controller.