SYSTEM POWER SUPPLY

The present invention discloses a system power supply, including an input power supply, a working power supply unit, a plurality of control modules and a wiring harness. The wiring harness includes a working power supply line and an input power supply line. An input power supply port of each control module is connected to the input power supply line, and a working power supply port is connected to the working power supply line. The input power supply is connected to the input power supply line, and an output of the working power supply unit is connected to the working power supply line. The present invention uses a working power supply line to provide working power supply to a plurality of control modules, eliminating the traditional operation of configuring an independent working power supply for each control module, thereby realizing a control system with low cost and high reliability, and facilitating the miniaturization and integrated circuitization of the control module.