Abstract: The timing sequence between different pulses in SG-Ⅲ laser facility is controlled with three arbitrary waveform generators. External clock and external trigger, which are provided by the synchronization system, are used to make sure that all the three arbitrary waveform generators can work synchronously. The temporal waveform and phase change after reboot of the arbitrary waveform generator can be corrected through close-loop control. The verification experiment shows that the three arbitrary waveform generators can work synchronously using this technology, which ensures the synchronization error control of the SG-Ⅲ laser facility.