The research progress on graphene/graphene oxide (GO) based fiber sensors is briefly reviewed. Detection object, sensing mechanism, structural design, and sensitivity of various graphene/GO based fiber sensors are discussed. The graphene-based micro/nano fiber sensors, graphene-based photonic crystal fiber sensors, graphene-based fiber grating sensors, and GO based fiber sensors are briefly reviewed. The preparation process of graphene/GO-fiber composite waveguide is briefly described. The existing problems of graphene/GO based fiber sensors are summarized.