The invention relates to the technical field of power line construction tools, in particular to a grounding wire winding device to solve the problems that when a worker winds a grounding wire by hand, the hand of the worker is prone to being scratched, and working efficiency is low. According to the grounding wire winding device, the grounding wire is conveyed through rotation of upper wheels and lower wheels, the grounding wire is wound through interval rotation of a winding rod, the grounding wire is clamped through a grounding clamping assembly, the wound grounding wire is cut off through a cutter, the whole winding operation is finished through equipment, and unnecessary damage caused by the fact that the hand of the worker makes direct contact with the grounding wire for performing winding is avoided; the operation is finished through the equipment, and the working efficiency is high.