Abstract: The accuracy of DC electronic voltage transformer is related to the accurate metering of power in DC transmission system.At present,the accuracy problem of DC electronic voltage transformer exists in practical operation,while there is little research on measurement error of DC electronic voltage transformer.Therefore,this paper establishes error model for each link of DC electronic voltage transformer,analyzes the error of voltage divider body,A/D conversion error of remote module and interpolation error of merging unit,and the range of theoretical error of each part is given.It is concluded that the error of DC electronic voltage transformer mainly origins from the voltage divider body.Finally,the error test of transformer is carried out,and the experimental results are basically consistent with the theoretical error range.