Abstract: High-voltage grounding wire is an important safety tool for maintenance of substation equipment. Each side of the maintenance equipment is grounded through the grounding wire to provide safety assurance for the staff during maintenance. However, the standard copper grounding wire is heavy, and it is difficult for one person to complete the storage alone. Through the development of high-voltage grounding wire storage trolley, the goal of one person to store and transport the grounding wire alone is realized. This paper describes the overall structure, main components and main functions of the high-voltage grounding wire storage trolley in detail. The characteristics and application prospects of the high-voltage grounding wire storage trolley are introduced.