Abstract: This project is specifically aimed at 10 kV and 0.4 kV distribution overhead lines live installation of distribution switches and related distribution line construction tasks, the current operation mode lack of special installation tools, affect customer perception of electricity, there are safety risks and other problems. With the help of physical mechanical and electrical principles, the new device adjusts the original hoisting and installation orientation mode by rotating the column, triangular boom, overload sensor, pulley block and other mechanical and electrical structures, making the installation process time-saving, labor saving, safe and reliable, ensuring the stability of the hoisting frame and tower to the maximum extent, which not only ensures the customer satisfaction with electricity consumption, but also ensures the stability of the hoisting frame and tower. It also ensures the safety of construction and installation of distribution switches in live environment.