Certificate access machine core equipment

The utility model discloses a certificate storing and taking machine core device which comprises a main box body, a certificate in-out device, a certificate lifting storing and taking device, a variable-capacity certificate library and a control device, and the certificate in-out device, the certificate lifting storing and taking device, the variable-capacity certificate library and the control device are arranged in the main box body. The variable-capacity certificate library comprises a rotating mechanism, a central shaft and a plurality of certificate storage layers which are sequentially arranged from top to bottom, each certificate storage layer comprises a rotating disc and a plurality of certificate boxes, the rotating discs are fixed to the central shaft, the certificate boxes areevenly arranged around the rotating discs and fixedly connected with the rotating discs, and a certificate protection box is stored in each certificate box. The certificate protection box can be takenout or put in by the cert