High-voltage pulse fracturing technology is based on theelectro-hydraulic effectprinciple,where strong shock wave generated by the discharge of water pulse creates cracks in the rock.It has become a hot research subject in the field of rock fracturing.This paper sets up two types of current source modules applied to the water discharge,the single and the double current source modules.And the electrodes voltage and current waveforms of the modules are explored by the needle electrodes at different discharge ...