In this article,we propose a wireless DC voltage transformer calibration method and related hardware design for Jinping-Suzhou±800 kV DC converter station to conduct error validation test on DC voltage transformer.The proposed method is based on wireless communication and Beidou synchronous technology to solve the issue of long distance between the DC transformer voltage divider and the secondary communication measuring system.The test results show that a minor deviation is observed in wireless calibration test on measurement of low voltage.While on measurement of high voltage,the GPS positioning and synchronization are affected owing to the high voltage and strong electromagnetic environment,which produce instability and minor deviation of the calibration.To resolve this problem,the characteristics of wireless calibration system of DC voltage transformers are analyzed under interference of complex electromagnetic environment,and a solution is proposed to reduce the error generated in DC voltage transformers using wireless transmission approach.This will avail the development of wireless calibration technology for DC voltage transformers.