Highway bridge expansion joint sealing protection device

The invention discloses a highway bridge expansion joint sealing protection device comprising a first connecting seat and a second connecting seat. The first connecting seat and the second connecting seat are correspondingly provided with connecting holes; connecting pillars are arranged in the connecting holes; fixed rings are arranged on both of the outer side of the first connecting seat and the outer side of the second connecting seat; and first padding blocks are arranged on the inner side of the second connecting seat. The highway bridge expansion joint sealing protection device has the advantages that according to the pressure measured by a pressure sensor, a controller is utilized to control a heating device or a refrigerating device to work; the first filling blocks and the second filling blocks are subjected to deformation; a bridge floor is in the state of seamless connection all the time; the workload in the protection period is reduced; the first padding blocks and the second padding blocks can b