The utility model provides a grounding line mounting and dismounting device. The grounding line mounting and dismounting device comprises a sleeve cylinder and a driving unit. The sleeve cylinder is composed of an inner cylinder, a hand-held cylinder and a fixed cylinder. The inner cylinder is provided with an elastic insulating layer as a liner. The fixed cylinder sleeves the outer side of the upper part of the inner cylinder. The hand-held cylinder sleeves the outer side of the lower part of the inner cylinder. The hand-held cylinder is rotatable relative to the inner cylinder. A separator plate is arranged at the middle part of the inner cylinder. A ring clamp is arranged on the outer side of the sleeve cylinder and used for tightening the sleeve cylinder. By using the grounding line mounting and dismounting device, physical power used for mounting and dismounting a grounding line is saved, and time for mounting and dismounting the grounding line is effectively controlled, so that the overall operation time is effectively shortened, and the safety management level is improved.