The utility model relates to a vacuum section switch fault pre-warning system for an urban and rural power supply line. The vacuum section switch fault pre-warning system for the urban and rural power supply line comprises state acquisition modules of vacuum section switches, fault pre-warning terminal devices, a GSM mobile communication network and a monitoring master station which manages the plurality of fault pre-warning terminal devices in a remote mode. The state acquisition module of each section switch comprises a three-phase current mutual inductor, a humidity sensor, sonic sensors and a switch on-off state signal transducer. Each fault pre-warning terminal device comprises a signal conditioning circuit, an A/D data acquisition module, a control chip, a communication module, a display module, a keyboard module, a power supply module, a clock module and an alarming module. The monitoring master station comprises a built-in GSM wireless communication module short message receiving terminal device, a serial port communication line, an industrial computer server and a fault display device, wherein the industrial computer server is connected with the built-in GSM wireless communication module short message receiving terminal device through the serial port communication line, and the fault display device is connected with the industrial computer server. The vacuum section switch fault pre-warning system for the urban and rural power supply line can solve the fault pre-warming problem of the vacuum section switch of the power supply line, and power supply reliability is improved.