A programmable pulsed power supply of hollow cathode discharge tube (HCD) for optogalvanic spectroscopy is fabricated. The optogalvanic signal of transition 5L 6 16900 7M 7 is measured. By adjusting the pulse width, pulse frequency, DC bias, as well as the output voltage, the optogalvanic spectra are obtained with good qualities. Spectra obtained by using different parameters were compared and discussed.