The design of multi-frequency electrical stimulation waveform generator contains low-frequency module, medium-frequency module, and ON/OFF percentage module. Meanwhile, this generator includes seven kinds of low-frequency and three kinds of medium-frequency for producing different electrical stimulation output waveform. The stimulation duration is from 10 to 630 mu s. The proposed multi-frequency electrical stimulation waveform generator is implemented on Altera EP1K100FC484-3 device.