The invention discloses a burst optical signal producing circuit as well as a method for producing burst optical signals. The burst optical signal producing circuit comprises a programmable error code unit, a plurality of optical decay units as well as a photosynthesis way unit which are connected in sequence; each optical decay unit receives electric signals under the effect of multiple burst enable signals output by the programmable error code unit and converts the electric signals into optical signals to decay; each decayed optical signal is converted into an optical signal by the photosynthesis way unit to output; an electric signal shunt unit is connected between the programmable error code unit and each optical decay unit; the programmable error code unit outputs a burst electric signal separated at a time domain to the electric signal shunt unit; the electric signal shunt unit separates the burst electric signal into multiple paths of identical burst electric signals, and transmits the multiple paths of identical burst electric signals respectively to each optical decay unit. According to the burst optical signal producing circuit disclosed by the invention, the equipment connection can be simplified; moreover, various parameters of the burst optical signals can be adjusted; the application range can be expanded.