Elevator display convenient to assemble

The elevator displayer convenient to assemble comprises a displayer body, a cover shell is welded to the back of the displayer body, connecting blocks are arranged on the upper portion and the lower portion of the displayer body, concave holes are symmetrically formed in the surfaces of the sides, corresponding to the cover shell, of the connecting blocks, and a plurality of guide grooves are fixedly connected to the inner side of the cover shell; a threaded rod and a sliding block are arranged in the guide groove, one end of the threaded rod penetrates through the guide groove, a first spiral bevel gear is installed at the penetrating end of the threaded rod, a second spiral bevel gear is meshed with one side of the first spiral bevel gear, an inserting rod is welded to the end of the sliding block, and the inserting rod is connected with the concave hole in an inserting mode. The upper and lower groups of sliding blocks are adjusted to be matched with the guide grooves to move oppositely, so that the insert