Dismounting and mounting tool

The utility model discloses a dismounting and mounting tool which comprises a ratchet mechanism with a handle, a connecting rod in transmission connection with the ratchet mechanism, and a jacket fixed at one end of the connecting rod and used for sleeving a lifting ring nut, the clamping sleeve is of a flat hollow structure with an opening, and transmission structures are arranged outside the two narrow side portions of the clamping sleeve so as to be in transmission connection with the clamping plate. The transmission structure is connected with a rope, and the transmission structure can drive the clamping plate to move in the direction of opening the opening by pulling the rope. The transmission structure is provided with an elastic reset piece which can drive the clamping plate to move in the direction of closing the opening and is used for abutting against the bottom end of the lifting ring nut. The utility model has the benefits that the correction function is realized, and the damage is avoided. 本实用新型公