Abstract: In order to get a better understanding of the principle of high-energy pulsed arc fracturing,determine key factors affecting its fracturing results,theoretical analysis and lab experiment were conducted for high-energy pulsed arc fracturing.The theoretical analysis indicates that the pulse wave pressure produced in high-energy pulsed arc fracturing depends on the discharging voltage,pulse energy and discharging time.Lab experiment shows that obvious fractures around the wellbore in concrete samples can be created by using different discharging voltages,the fractures are radial with no obvious bending in near wellbore area.The testing results show that the pulse pressure peak will increase with the increase of discharging voltage and pulse energy,and the fracture height and length will also increase.The research results provide testing data for further high-energy pulsed arc fracturing.