S-band three types configuration dispersion compensation fiber(DCF) Raman ampolifiers(FRA) were researched.Experimental confirmation:The gain and noise characteristic of 5 km DCF-50 km G652 fiber configuration dispersion compensation FRA is better than 50 km-G652-5 km DCF FRA and 25 km G652-5 km DCF-25 km G652 FRA.The gain spectrum and noise characteristic of 5 km DCF-50 km G652,FRA were measured.In the DWDM fiber transmission system,the transmitted characteristic of two channels that spectral distance is 0.262 nm (34.1 GHz) on the dispersion compensation FRA is better than 50 km G652 positive dispersion FRA and 5 km DCF negative dispersion FRA on the S-band 1 520 nm wavelength range.