According to the requirements of gate-control circuit in range-gated low-light-level ICCD components and underwater high-speed imaging components a high accuracy and low jitter synchronous pulse control technique based on FPGA fine adjustment unit IODELAY was proposed to solve the synchronization and the jitter problem between the output pulse and the external trigger. This unit has the advantage of small temperature effect and high time resolution, which fully meets the requirements of the gated-control time precision and jitter of the image tube in the component. This technology has good application in all kinds of gate control components.