The utility model discloses a sealing device for a rolling machine and a transition roller in a rolled glass production line. The sealing device comprises a sealing device body between a melting furnace and an annealing furnace and comprises an upper sealing body and a lower sealing body meshed together; the upper sealing body is arranged above the rolling machine and the transition roller; the lower sealing body is arranged below the rolling machine and the transition roller; the front parts of the upper sealing body and the lower sealing body are respectively connected with the melting furnace, and the rear parts of the upper sealing body and the lower sealing body are respectively connected with the annealing furnace; conveying holes or grooves are respectively formed in connecting matching surfaces; the upper sealing body is arranged on a steel bracket process platform of the rolling machine and the transition roller through a lifting adjusting mechanism; the lower sealing body is fixed on a ground rail between the rolling machine and the transition roller. The transition roller sealing device is reasonable in structural design, can effectively reduce or prevent heat loss of the edge of the melting furnace and a glass tape which passes through the rolling machine and the transition roller, has the effects of energy conservation and environment protection, is convenient to operate, and does not influence replacement of the rolling machine and the transition roller.