Abstract: This article describes the design and performance of a rep-frequency pulsed-current source. The scheme for rep-frequency pulse current source is based on the new type reversely switching dynistor(RSD). The pulsed-current source, which mainly consists of RSD switch with the diameter of 52 mm, fast thyristors and magnetic switch and etc, is capable of working at single shot, rep-frequency of 1, 10 and 100 Hz. The pulsed-current source can deliver a pulse current with peak current about 62 kA, with a pulse width up to 10 μs, current rate of rise of 18 kA/μs and at working voltage of 1 kV.