Bearing pedestal sealing device for roller of rolling mill

The invention provides a bearing pedestal sealing device for a roller of a rolling mill. The bearing pedestal sealing device comprises a labyrinth-type sealing inner ring sleeved on a shaft neck of the roller, wherein a plurality of turns of rectangular sealing cavities I are formed on the outer circumferential surface of the sealing inner ring; a sealing outer cover is sleeved on the outer side of the sealing inner ring and is in a split type; rectangular sealing cavities II matched with the rectangular sealing cavities I are formed on the inner side face of the sealing outer cover; a through hole is formed in the sealing outer cover; a transmittance cover matched with the sealing inner ring is arranged between a bearing pedestal and the sealing outer cover; an oil seal is arranged on an inner ring of the transmittance cover; and the sealing outer cover and the transmittance cover are fixedly connected with the bearing pedestal arranged at the end of the roller through connection pieces. The device is good in sealing effect, simple in structure and convenient to dismantle; and a phenomenon that a bearing is burned-out can be effectively avoided.