Abstract—For research of VFTC measurement with UHV level, this paper studies the design of electronic current transformer for UHV VFTC measurement. The transient characteristics (amplitude, frequency band and response speed) of VFTC are analyzed. Based on the work mechanism of Rogowski coil, an electronic current transformer for UHV VFTC measurement is designed. On the basis of comparing various kinds of, Rogowski coil with PCB form using external-integral circuit is adopted. Structural designing and electrical parameters calculation are the most important procedure to design the electron current transformer based on Rogowski coil with PCB form. The structural parameters is determined by the manufacturing process of PCB board. According to the manufacture requirements, the inner and outer radius of the coil, the number of turns, the thickness of PCB board and the size of copper foil are calculated. Among them, the size of copper foil is the key design parameter. The electrical calculation include self-inductance, internal resistance, distributed capacitance and sampling resistance. while, sampling resistance is the key electrical parameter, which is mainly determined by the measurement frequency and the coil resistance. In the end, the author summarizes the design procedure of ECT based on PCB Rogowski coil in details. A simulation is carried out to check the correctness of the design, and the result shows that The ECT designed can absolutely be used to measure VFTC with UHV level. In order to verify the correctness of the design, the PCB Rogowski coil is designed and verified. The results show that the PCB Rogowski coil with external integration meets the measurement requirements of UHV VFTC.