Belt pulley disassembling and assembling tool

The utility model provides a belt pulley dismounting and mounting tool, and belongs to the technical field of belt pulley dismounting and mounting tools. The belt pulley disassembling and assembling tool comprises a sliding rod, a sliding weight is installed on the sliding rod, a collided structure is arranged on the sliding rod, at least two jacking structures are arranged at the end of the sliding rod in the circumferential direction at intervals, each jacking structure comprises a jacking piece used for jacking the inner wall of a weight reduction groove of a belt pulley, and each jacking piece is provided with a jacking station used for jacking the inner wall of the weight reduction groove after moving outwards in the radial direction. The separating station moves inwards in the radial direction and then is separated from the inner wall of the weight reduction groove; the collided structure comprises a disassembly collided structure arranged on the side, deviating from the jacking structure, of the slidin