The invention discloses an electronic power-frequency voltage-withstand test voltage-regulating device, a test wiring circuit and a test voltage-regulating method, belongs to the technical field of electrical tests, and in particularly relates to an electronic power-frequency voltage-withstand test voltage-regulating device. The invention provides an electronic power-frequency voltage-withstand test voltage-regulating device which is stable in structure and reduced in output waveform distortion. The electronic power-frequency voltage-withstand test voltage-regulating device disclosed by the invention comprises a sine wave voltage-regulating module (capable of using the FZXB2000 of Shanghai Fushen Electronic Technology CO., LTD), a microcomputer control module, an operation panel, a switch power supply, a high-voltage current analogue-digital converter, a high-voltage voltage analogue-digital converter, a low-voltage current analogue-digital converter, a low-voltage voltage analogue-digital converter, a high-voltage current connecting wire, a high-voltage measuring wire and a test transformer low-voltage wire, wherein the structural essential is that the port of the microcomputer control module is connected with the port of the sine wave voltage-regulating module, the port of the operation panel, the port of the switch power supply, the port of the high-voltage current analogue-digital converter, the port of the high-voltage voltage analogue-digital converter, the port of the low-voltage current analogue-digital converter and the port of the low-voltage voltage analogue-digital converter respectively.