The invention discloses a coiling block rubber sleeve assembling and disassembling tool and an assembling and disassembling method. The coiling block rubber sleeve assembling and disassembling tool comprises an arc-shaped tank body, wherein a rubber sleeve baffle ring for limiting the cross section of a rubber sleeve is arranged at at least one end of the tank body; a fixing mechanism for mounting and fixing the tank body is arranged at the bottom of the tank body. As the rubber sleeve is positioned inside the tank body and does not deform, the phenomenon that the rubber sleeve is blocked when being mounted is avoided; when being assembled and disassembled, the rubber sleeve is limited and stressed through the rubber sleeve baffle ring at one end of the tank body and is uniformly stressed in the axial direction, the assembling and dissembling operation on the rubber sleeve is simplified, and the rubber sleeve is prevented from being damaged when being assembled and disassembled; when the coiling block rubber sleeve assembling and disassembling tool cooperates with a steel coil trolley, a baffle and a positioning clamping plate are arranged at the bottom of the tank body so as to fix the tank body, so that the processing is easy, the operation is simple and rapid, and the manufacturing cost is low; when the rubber sleeve is disassembled by using the method disclosed by the invention, the possibility of blockage is low, the rubber sleeve assembling and disassembling efficiency is improved, the service life of the rubber sleeve is prolonged, and the production cost is lowered.