Since the traditional capacitive voltage transformer does not have good response characteristics in the high frequency band, and can not meet the requirements of voltage traveling wave measurement, the development of the voltage traveling wave fault location method is to some degree limited. Through coretype traveling wave sensor is designed according to the Rogowski coil principle in this paper. It can measure the current travelingwave from CVT to ground and transfer voltage travelingwave signals of transmission line effectively without high speed data acquisition. The designed sensor can be implemented in the fault location of voltage traveling wave. A variety of frequency response characteristics including frequency response, highfrequency transient traveling wave signal response, power frequency, withstand voltage and antiinterference of the designed sensor are tested in this paper. The testing results show that the sensor with excellent amplitude characteristics can efficiently transfer the traveling wave signal of frequency range from 10 kHz to 2 MHz. Therefore it can also further avoid maloperation of the protection by shielding the power frequency signal and preventing grounding leakage current transferring to the secondary of transformer.