To realize intelligently adjustable pulse-shaping, a computer was used to control the gate bias of each GaAs filed-effect transistor (FET) and superpose pulses generated by them. To improve the stability and reduce the trigger jitter of shaped-pulse, the pulse shaping circuit was properly designed. 1~5 V adjustable amplitude, 0~3 ns square wave width, rising edge 250 ps falling edge 350 ps, 4% (peak to peak) amplitude stability, and 200 ps time domain adjustment precision were obtained.