The invention relates to a sealed conveying roller which comprises a roller drum and shaft heads; the roller drum is provided with a cavity penetrating in the axial direction; the shaft heads are separately mounted at two ends of the roller drum; each shaft head comprises a rotating shaft body and a connecting body; the rotating shaft body and the connecting body are connected integrally; the cavity is blocked by the connecting body; the connecting body is hermetically welded with the roller drum; and the rotating shaft body shares a coaxial line with the roller drum. The sealed conveying roller rolls through the rotating shaft body, small in rotational inertia, and is easy to start and stop. The sealing performance of the shaft heads and the roller drum is high, the connecting strength ishigh, stable and reliable rotation of the sealed conveying roller is ensured, and the sealed conveying roller has high air tightness.