Abstract: Under the slowly-varying-envelope approximation, the three coupled-wave equations were resolved and the storage of optical pulses was demonstrated theoretically. The variation of readout efficiency of date pulses versus acoustic lifetime, Brillouin gain coefficient, date pulse intensity and control pulse intensity were studied. The results show that, better readout efficiency and longer storage time of date pulses can be obtained with longer acoustic lifetime. Both Brillouin gain coefficient and the intensity of date pulses have no effect on readout efficiency. However, for a given readout efficiency, the intensity of control pulses decreases with increasing the Brillouin gain coefficient. Compared with long pulses, this optical storage method is more applicable for short ones.