The invention provides a method and device for adjusting a
fiber mirror in high-
voltage electrical equipment and a medium, and the method comprises the steps: constructing simulated high-
voltage electrical equipment according to the electrical parameters and equipment structure of the high-
voltage electrical equipment, and constructing a simulated
fiber mirror according to the equipment structure and
fiber mirror parameters of the fiber mirror, the
simulation fiberscope is arranged in the
simulation high-voltage electrical equipment, the
electric field intensity, influenced by the
simulation fiberscope, of the simulation high-voltage electrical equipment is calculated, the
magnetic field intensity, influenced by the simulation
fiberscope, of the simulation high-voltage electrical equipment is calculated, and fiberscope parameters in the simulation fiberscope are adjusted according to the
electric field intensity and the
magnetic field intensity. The difference value between the
electric field intensity and the preset electric
field intensity threshold value is smaller than a first preset difference threshold value, and the difference value between the
magnetic field intensity and the preset magnetic
field intensity is smaller than a second preset difference threshold value. And the electric
field intensity and the magnetic field intensity of the simulated high-voltage electrical equipment reach preset threshold values by adjusting parameters of the simulated fiberscope.