Voltage divider of direct-current voltage source for verifying extra-high-voltage direct-current transformer and assembling method

The invention discloses a voltage divider of a direct-current voltage source for verifying an extra-high-voltage direct-current transformer and an assembling method, and the voltage divider is arranged in an insulating cylinder and comprises a high-voltage arm resistor, a low-voltage arm resistor, a high-voltage shielding resistor and a low-voltage shielding resistor; positive temperature coefficient resistors and negative temperature coefficient resistors with the same absolute values of temperature coefficients are connected in series at intervals; equipotential points are respectively established at two ends of the high-voltage arm resistor and the low-voltage arm resistor by using the high-voltage shielding resistor and the low-voltage shielding resistor; and the insulating cylinder is filled with transformer oil or is filled with circulating insulating gas. The insulating cylinder ensures that the influence of temperature on the voltage division ratio is minimized in the same temperature environment, the