Sometimes it may need some irregular waveforms which are used for synchronized signal in optical-fiber communications domain. This paper introduces a design method of arbitrary waveform gene-rator which can gain more precision based on multi- pulses synthesis. Moreover it also elaborates the principle of hardware system and produces the concrete hardware architecture diagram. The system works under 1G clock and carries on digital-analog conversion by AD9735. Then these data that are transmitted by PC will become 16 narrow pulses which have 0.5 ns widths and different scopes. Thus they make up of the arbitrary waveform which works in practical situation. Through lots of real experiments

it is verified that this method has better flexibility and practicability.