Novel kiln tail sealing device

The utility model relates to the technical field of kiln tail sealing of cement kilns, in particular to a novel kiln tail sealing device. The novel kiln tail sealing device solves the technical problem that in the prior art, a kiln tail sealing structure of a cement kiln cannot compensate size changes caused by thermal expansion and cold contraction of the kiln tail, and consequently the sealing structure is prone to failure. A novel kiln tail sealing device comprises a kiln tail, a sealing cover and a sealing plate, and the sealing plate is located between the kiln tail and the sealing cover and used for sealing the kiln tail. The sealing cover is fixed to the kiln tail through a compensator, and the sealing plate is fixed to the kiln tail through the sealing cover. The sliding rod pushes the positioning plate to move by utilizing the gravity of the sliding rod, and the sliding rod does not need to be fixed, so that the size change of the kiln tail caused by thermal expansion and cold contraction can be effe