Abstract: Due to themerits of high quality, high efficiency, high robustness and compact size, the fiber laser systems have developed rapidly in the past 20 years, and have been widely used. However, there are still some factors (such as nonlinear effect, thermal effect, transverse mode instability (TMI), etc.) that limit the scaling of output power of fiber lasers. As one of the main limitations, Stimulated Raman Scattering (SRS) effect not only reduces the fiber lasers’ efficiency, but also increases the risk of device damage with the backward-Stokes light. In addition, recent studies have shown that SRS effect in few-mode fiber lasers can result in TMI and another type of mode distortion, which is on a much slower time scale. Thereby, from the aspect of fiber design and laser systems, amounts of mitigation strategies have been carry out to suppress this nonlinear effect. In this paper, besides the concise description of SRS-induced mode distortion, the suppression strategies in the past decade are also summarized from the aspect of the fiber laser system optimization.