The characteristic of 10 kV feeder lines are emphatically analyzed. The main function of dividing load switch, the matching problems between this equipment and relay protection device, and some problems that should be noticed in operation and maintenance is focused on. Based on the characteristic of 10kV feeder lines, the adoption of dividing load switch in 10kV feed over-head transmission line is suggested, which can reduce the joint power cut accident of without fault line, shrink the outage time and area, and raise the reliability of power supply system.