The invention relates to paper-cup producing equipment, in particular to a cup-bottom rolled-sealing mechanism of a radial pushing-type paper cup. The upper end surface of an outer mould seat is connected with a knurled outer mould, a cup bottom subjected to hot rolling sleeves the inner hole of the knurled outer mould, a rolled-sealing edge of a knurled wheel is arranged at a groove part where the lower part of a cup body is combined with the cup bottom, the knurled wheel is movably connected with a wheel seat, the wheel seat is connected with a sliding block and is fixed by a pressing cover, the sliding block is in radial sliding connection with a sliding seat, the sliding seat is fixedly connected with a rolled rotating seat, the upper part of the rolled rotating seat is in the shape of a disk, an opening part is provided with a swinging hook, the swinging hook is provided with swinging heads, an upper swinging head is matched with a sliding-block groove, a lower swinging head is matched with a sliding-rod groove, and the sliding block radially moves through the upward and downward sliding of a sliding rod to drive the knurled wheel to offset; the defects of small pressure and rapid abrasion due to the pushing of the sliding block through the point contact of a swinging rod and the axial pushing negative pressure generated by the pushing of the sliding block through the inclined-surface contact of the swinging rod are overcome. The cup-bottom rolled-sealing mechanism has the advantages that the pressure is increased, the axial negative pressure is also eliminated, the rolled-sealing quality is improved, and the like.