The influence of forward Raman amplification on the Brillouin scattering signal of pulse light is investigated by experiments,including the spontaneous Brillouin scattering and the stimulated Brillouin scattering(SBS).The results show that the spontaneous Brillouin scattering is amplified by the fiber Raman amplifier and the fiber Brillouin amplifier,and consequently the gain is high.For the amplification of SBS signal,it is only amplified by the Raman amplifier in the fiber.As the Raman pump power reaches 600 mW,it causes the multi-order Brillouin scattering,and then the gain of the first order Stokes SBS starts to saturate and decline.