In order to meet the requirements in electrical discharge machining (EDM),an implementation of EDM pulse power supply based on FPGA was presented.The working principle of EDM pulse power supply was discussed.The high-frequency pulse generator,implemented with soft intelligent property (IP) core,played a very important role in the pulse power supply which could be effectively communicated with the upper computer.The pulse width and pulse interval of output signal could be adjusted.The good performance of the proposed method was verified by simulated and circuit testing.