The invention discloses a trolley special for assembly and disassembly of a high-position grounding wire. The trolley comprises an insulating rod and grounding wire clamping heads. The trolley is characterized in that the lower end of the insulation rod is vertically fixed in the middle of the upper plate face of an upper track plate of an intersecting lifting device, and an upper rotating disc is fixed in the middle of the bottom plate face of a lower track plate of the intersecting lifting device; a hydraulic cylinder is installed in a through hole formed in the middle of the rotating disc, and a piston rod of the hydraulic cylinder is rotatably connected with the middle of an intersecting communicated shaft at the lower end of the intersecting lifting device; the rotating disc extends into a compartment and is driven through a motor. According to the trolley special for the assembly and disassembly of the high-position grounding wire, lifting, dropping and rotating can be achieved, operation is safe, the supporting capacity is high, the center of gravity is stable, the assembly and disassembly saver labor and are rapid, the cost is low, the efficiency is high, the position to be hung with the grounding wire of repair equipment can be accurately positioned so as to complete the grounding operation, and multiple defects and risk factors of an existing operation mode are effectively eliminated; the structure is simple, the manufacturing cost is low, and the trolley can be widely applied to the assembly and disassembly of high-position grounding wires of a transformer substation.