Provided is a distributed automatic power supply on and off control system for a fault recorder. The system comprises an information far transmission host installed in an information far transmission screen, a power supply on and off controller installed in the fault recorder, an intermediate relay and a fault recorder microcomputer processor. The information far transmission host is connected with the power supply on and off controller through a serial port, the power supply on and off controller is connected with the intermediate relay through a power control line, and the information far transmission host is connected with the fault recorder microcomputer processor through an Ethernet switch. According to the distributed automatic power supply on and off control system for the fault recorder, whether the fault recorder microcomputer processor crashes or not is judged through communication of the fault recorder and an information far transmission substation system, and then the power supply on and off controller is utilized to control the intermediate relay to switch on and off a power supply of the fault recorder, so that the fault recorder microcomputer processor can be automatically restarted, and the problem that the fault recorder microcomputer processor in a transformer substation must be restarted manually after crashing is effectively solved.