Vehicle-mounted controller supporting cascade main-standby switching

The invention discloses a vehicle-mounted controller supporting cascade main/standby switching. The vehicle-mounted controller comprises a CPU control module, an AD acquisition module, a communication module, an IO interface module and a main/standby switching module, the CPU control module mainly comprises a full-localization CPU, a state indicating lamp, an operating system, a control software algorithm and the like; the AD acquisition module mainly comprises an analog quantity conditioning circuit and an AD chip circuit; the communication module mainly comprises an RS-485 communication circuit, an RS-232 communication circuit, a CAN communication circuit, an Ethernet communication circuit and an RSSD circuit. The IO interface module mainly comprises a digital quantity input module and a digital quantity output module; the main and standby switching module mainly comprises a controller main and standby switching circuit. According to the vehicle-mounted controller, the problem that the localization degree o