The invention belongs to the technical field of measurement and test, and particularly relates to a voltage measurement device for a high-voltage direct-current power transmission valve assembly. The measurement device comprises an upper circular plate electrode, a high-voltage arm resistor, a lower circular plate electrode and a low-voltage arm which are connected in turn from the top to the bottom; the upper circular plate electrode, the high-voltage arm resistor and the lower circular plate electrode form a transverse H-shaped symmetrical circular plate electrode structure; space capacitors between the high-voltage arm resistor and the upper and lower circular plate electrodes are taken as high-voltage arm capacitors; the upper end of the high-voltage arm resistor is provided with a high-voltage lead end, while the lower end is sleeved with an insulating cushion cover; and the lower circular plate electrode is in insulated connection with the high-voltage arm resistor through the insulating cushion cover. The measurement device has the advantages of small volume, high reliability, good stability, simple and convenient maintenance and the like; the measurement range of the measurement device can reach +/-50kV, the frequency band is 0 to 10MHz, the actually measured partial pressure ratio is 33,464: 1, and the maximum measurement error is 2.48 percent; and the measurement device can fully meet the measurement requirement of converter valve test.