Adopting integrated optical technology, an integrated optical waveguide current sensor for high current measurement is designed and developed, the size of the device is 78 mm×18 mm×9 mm. The theoretical analysis of the sensor structure with multiple loop antennas and modulation electrodes is carried out. The COMSOL Multiphysics software is used to establish a three-dimensional model of the sensor, the simulation results show that the designed sensor can be used to measure the pulse high current. The experiment system for pulse high current measurement was built to test the performance of the sensor. The results show that when the pulse current time domain waveform measured by the sensor is compared with that measured by the Pearson current transformer, the mean relative errors of the wavefront time Tf and the duration time Td are 3. 977 5% and 5. 437 5% , respectively. The linear correlation coefficient is 0. 998 97 in the measured current range of 100~3 300 A. When the SNR is 6 dB, the minimum measurable current of the sensor is 66 A.