Abstract: In order to solve the power supply reliability and safety problems of 10 kV power distribution system in Shanghai urban A-class area. Shanghai Power Supply Company proposed a 10 kV "diamond-type" distribution network self-healing control system based on the characteristics of the current 10 kV distribution network with switching station as the core. According to the transformation of 10 kV distribution network in Fengxian area, the design points of the backbone network of the 10 kV "diamond" distribution network self-healing control system are analyzed and summarized.