To improve the quality of power supply and supply, and at the same time improve the quality of service to power users, the integration of primary and secondary equipment is the only way. Given the problems existing in the on-column switch, the high reliability of the intelligent on-column switch integrated in the first and second integrations has been deeply studied. One part has improved the traditional on-column switch and operating mechanism design, effectively solving the condensation. Water, sealing and mechanism jamming; the second part is designed by integrating FTU function, using modern sensing technology to realize the all-round condition monitoring of the on-column switch; the first and second integral parts unify the standard interface and enhance the column The level of integration of the upper switch. The implementation of the project will effectively promote the integration process of primary and secondary equipment in the distribution network, and improve power quality and reliability of power supply.