In view of filter principle of superstructure fiber bragg grating' theoretically analyzing, the superstructure fiber bragg grating filter has been used in the spectrum measurement of Brillouin scattering．The separation of spontaneous Brillouin scattering with Rayleigh scatering and the measurement of spontaneous Brillouin scatering in dispersion shifted fiber have been achieved．The experimental system and result are presented. The primary result confirms this configuration is feasible.