Pulse compression of two-cell stimulated Brillouin scattering (SBS) system in CCl4 liquid with high beam quality was experimentally investigated. The duration of Stokes pulse was tunable by simply changing the separation between two cells and the tuning range depended on the pump energy. By increasing the input energy, the wider tuning range of pulse width could be achieved. The numerical simulation on pulse shape of two-cell SBS system was made and agreed with the experimental results well.