Abstract: According to the low completion rate of uninterrupted power operations in Dalian Free Trade zone, it adopts the PDCA cycle in conjunction with Pareto’s Principle, Fishbone Diagram, and 5W1H analysis to cause the main reason for the low completion rate of uninterrupted power operations in distribution network.It gives the corresponding solutions for the main reasons and implements on site.It consolidates and promotes the corresponding measures to achieve the goal of improving the completion rate of uninterrupted operation in distribution network, and calculates the economic and social benefits.Through improving measures, it shortens the power interrupted time, improves the power supply reliability rate, and provides a reference for the relevant research of distribution network with uninterrupted operation in distribution network.