A low-threshold, narrow bandwidth random fiber laser by using a short erbium- doped fiber (EDF) to provide high-efficiency gain in a FBG-formed half-opened cavity is demon- strate. Typical random laser radiation based on the resonance between the FBG reflector and distributed random Rayleigh scattering of the long-distance SMF is realized. Single- and dual- wavelength random lasing operations are realized by using one- and two-FBGs respectively, with low threshold pump power of only 10 mW, which is about two orders lower in magnitude than that of the previously reported conventional random fiber lasers amplified through distributed Raman effect.