Abstract: In recent years, as an important technical means to improve the reliability of power supply, live breaking and connecting drainage lines have a strong demand in the transmission and transformation fields of complex and weak power grids. This article focuses on the practical problems of poor universality, high labor intensity, and high operational risks of arc suppression pulleys in the traditional process of live line disconnection and connection. Combined with the structural characteristics of transmission and transformation equipment, a live line disconnection and connection arc suppression device with quick installation function has been developed. The on-site application results are significant, solving the pain points and difficulties in the process of live line disconnection and connection in live line work, and achieving good social and economic benefits.