Abstract: With the development of pulse power technology, the pulse power supply modules (PPSMs) are widely used in areas of scientific research, medical treatment, industry, military, and geological exploration. In these areas, more and more energy is needed and the number of PPSMs is increasing rapidly, and accurate pulse discharging waveforms are required. How to control the numerous PPSMs to discharge in precise time sequence effectively to obtain the waveforms becomes one of the key problems in the pulse power technology.According to the requirements of a pulse discharging velocity source, a time sequence discharging control system is designed, which can control 30 PPSMs to discharge in a precise time sequence. In this control system, the digital signal processor (DSP) is used as the main control chip and the high speed photoelectric converters and optical fibers are used as the trigger signals transmission system. The time sequence can be set by using the upper computer software and the accuracy of the trigger pulses can reach microsecond level. This control system has been used in the actual experiments of the acceleration source and the results prove that the control system is effective.