The invention relates to an electronic transformer based on the principle of Rogowski coil in a GIS. The electronic transformer is characterized in that the electronic transformer comprises two parts including a remote end module and a merging unit, the remote end module mainly comprises a four-order Bessel low-pass filter, a high-speed high-precision analog-to-digital conversion device and a software integral algorithm. After the four-order Bessel low-pass filter carries out low-pass filtering on a signal outputted by an electronic transformer sensing element, the high-precision analog-to-digital conversion device carries out high rate sampling regularly, the integral reduction of a sampling signal is carried out through a software discrete integral algorithm, the measurement of primary current and voltage is realized, after electro-optical conversion, data is sent to the merging unit through a high-speed serial protocol, and the merging unit completes multi-channel data synchronization and data sharing. According to the electronic transformer, the operating reliability of the electronic transformer with the application of the principle of Rogowski coil in the GIS is effectively improved.