The invention discloses a rolling disc of a printer. The rolling disc is connected with a rotating shaft; a mold head is suspended above the rolling disc; the rolling disc comprises a turntable, a support disc and a distribution disc; the turntable is coated with the support disc; four sets of first screw holes and second screw holes are uniformly arranged on the side surface of the support disc; the distribution disc consists of multiple stoppers arranged at the periphery; the inner diameter of the distribution disc is matched with the outer diameter of the support disc; after the distribution disc is coated with the support disc, four screw holes uniformly distributed on the outer side of the distribution disc are correspondingly matched with the four sets of first screw holes of the support disc, and are fixedly connected by bolts; the stoppers of the distribution disc and a pressed surface of the support disc form rolling grooves of an impressing area; after the pressed surface of the support disc is worn, the four screw holes of the distribution disc are turned to be fixedly connected with the four sets of second screw holes of the support disc; and the stoppers and the pressed surface of the support disc form rolling grooves of a second impressing area for reuse.