A shaft sealer belongs to the technical field of mechanical engineering shafts. The shaft sealer comprises an inner ring I, a seal ring I, a seal ring II, an outer ring I, a seal ring III, an inner ring II, an outer ring II, a seal ring IV, a seal ring V and an inner ring III; the inner ring II and the inner ring III are arranged on the shaft table of the inner ring I, the seal ring I and the seal ring II are arranged in a groove at the shaft hole of the inner ring I, and the seal ring V is arranged in a groove between the inner ring I and the inner ring III; and the seal ring III is arranged in the groove of the outer ring I, and the seal ring IV is arranged in the groove of the outer ring II. The shaft sealer has the advantages that the installation is easy, no abrasion appears in the running process, damages are difficult, and the sealing effect is good.