The invention provides an electrode structure of a high impedance and broadband high-voltage divider, and belongs to the field of power electronic devices of an electronic system. The electrode structure of the invention ensures that the space stray capacitance value between the high voltage electrode and the high voltage arm resistance is in a linear decrement distribution from the high-voltage end to the low-voltage end along the high voltage arm resistance; space stray capacitance value between the low voltage electrode and the high voltage arm resistance is in linear incremental distribution from the high-voltage end to the low-voltage along the high voltage arm resistance, so the output voltage amplitude of the voltage divider has no relationship with the frequency of detected voltage, thereby ensuring that the voltage divider has higher input impedance and wider measure frequency band at the same time.