Abstract: With the rapid development of the social economy, users have higher requirements for the stability and safety of electricity consumption, and the drawbacks of previous power outage maintenance are gradually emerging. By benchmarking with advanced international and domestic power supply enterprises, live working can effectively reduce the number and time of planned power outages, and has been widely used as a technically mature means of distribution network operation and maintenance. This article focuses on the on-site work of replacing column mounted transformers with insulated gloves during short-term power outages, and combines the comprehensive non power outage operation method for replacing column mounted transformers in the 2022 distribution network non power outage operation skill competition of State Grid Corporation of China. The work steps and technical requirements for standardized on-site operations of this work are deeply discussed.