Annular belt printer

The utility model relates to the technical field of annular belt printing, and discloses an annular belt printer which comprises a main rack and a printer body installed on the main rack, a driving roller is rotationally connected in the main rack through a first bearing seat, the driving roller is matched with the printer body for printing, and a first driving mechanism is installed on the rear side of the main rack. The first driving mechanism drives the driving roller to rotate, the two smoothing mechanisms are correspondingly connected to the two sides of the main rack in a sliding mode, each smoothing mechanism comprises a sliding rail fixed to the inner side of the main rack, a sliding frame connected to the sliding rail in a sliding mode and a matching roller rotationally connected into the sliding frame through a second bearing pedestal, and the matching rollers are matched with the driving roller to smooth ring materials. The two sides of the main machine frame are respectively provided with a second