Abstract: This paper analyzes the characteristics and causes of thermal defects in high-voltage equipment connectors, points out the shortcomings of traditional power outage treatment technology and conventional live defect elimination technology, focuses on the ground potential discharge elimination technology of fast and long-term high-voltage connector thermal defects, and fully expounds the principle, device and use effect of this technology, which provides an important reference for the rapid and long-term elimination of high-voltage connector thermal defects, a common defect in power grid.