The article focuses on detailed analysis and research of one body and measuring system problems of DC voltage divider

and depth analysis of the working principle and the operation of DC voltage divider. Based on the DC voltage divider frequent failures in the application present situation

the corresponding optimization and improvement measures are put forward.By applying the methods of AC and DC voltage calibration and parameter measurement

the hidden dangers of DC voltage divider of Echeng converter station is researched. Through DC voltage divider operation analysis

the hidden danger should be identified and eliminated in advance

and the preventive measure is proposed.