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In this study,we demonstrate an all-fiber high-power linearly-polarized tunable Raman fiber laser system.An in-house high-power tunable fiber laser was employed as the pump source.A fiber loop mirror(FLM)serving as a high reflectivity mirror and a flat-cut endface serving as an output coupler were adopted to provide broadband feedback.A piece of 59-m commercial passive fiber was used as the Raman gain medium.The Raman laser had a 27.6 nm tuning range from 1112 nm to 1139.6 nm and a maximum output power of 125.3 W,which corresponds to a conversion efficiency of 79.4％.The polarization extinction ratio(PER)at all operational wavelengths was measured to be over 21 dB.To the best of our knowledge,this is the first report on a hundred-watt level linearly-polarized tunable Raman fiber laser.