Electronic current transducer is one of the key equipments for electric energy metering, measurement and protection in the power system. In order to comprehensively analyze the effects of different integration algorithms on its transfer characteristics, taking the Rogowski coil as example, the transfer characteristics were compared with frequently-used rectangular, trapezoidal, simpson and bilinear transform integration algorithms. Firstly, the overall transfer function of the electronic current transducer was obtained based on the Rogowski coil equivalent circuit and the integral algorithm. Secondly, the amplitude and phase frequency characteristics of the electronic current transducer were compared with different integration algorithms. Finally, taking an electronic current transducer at an 110kV substation as an example, the transducer transfer characteristics with different integration algorithm were simulated in the case of the steady-state and dynamic input signals. The results show that with the different integration algorithms, the electronic current transducer has good frequency characteristics and the steady-state transfer characteristics, however, it exhibits more obvious differences in terms of the capability of dynamic performances tracking and anti-interference and the anti disturbances.