In order to investigate the mechanism of distributed flushing fluid in porouselectrode Electrical Discharge Machining (EDM), modeling of the gap flow field was carried out. The numercial method of solidliquid twophase flow was used to simulate the process of twophase flow of flushing fluid in porouselectrode and solid debris, which was compared and investigated with that of single electrode to verify the EDM experimentally. The velocity of the flow between electrodes had a distributed feature because of the distributed outlet, and the periphery velocity was larger than that around center. After using porouselectrode, the solid debris was capable of evacuated the working area effectively along certain channels which resulting from the distributed flushing outlet. As compared with corresponding simulation results, the EDM experimental results show that the porous electrode is able to achieve a higher machining efficiency as a result of the evacuation effect of flushing fluid on debris, and the machining depth is affected by the machining speed weakly. On the other hand, as a result of the flushing influence on carbon adhesion to tool electrode, the tool wear rate is raised relaiely.