We developed an highvoltage pulse power supply used in mass spectromter, based on FPGA and Verilog HDL.The structure of the power supply is simple.The edge of the pulse is shorter, the frequency is increased, it has a stong antiinterference and flexible way of working. We can adjust the votage ,frequency, the width and the number of pulse in accordance with my requirements. So the developed period is shorter than before, the volume of circuit is smaller, the systemic stability is better. The power supply has more practicability and flexible promotion. The working mode of the power supply is flexible. It can export positive pulse or negative pulse, except that, the positive pulse and the negative pulse can be realtime switched , the number of the pulse can be seted as will.