Abstract: According to the special requirements of high-power diode pumped laser (DPL) for high-power driving power, we put forward a particular discharge and driving control circuit based on large current and constant power. We designed a suit of laser diode (LD) array driving power supply by combining the existing charging circuit with the over-current protection circuit, and applied it to DPL system which was based on high-power LD array. Through electrical properties and relevant experiment, it is proved that this power can provide a more than 200A driving current with the pulse width of 230s and the frequency of 20Hz for DPL.It has important value for kinds of DPL-based laser weapon systems in practice.