In order to obtain high quality tunable multi-wavelength laser,a novel approach of generating tunable multi-wavelength Brillouin fiber laser is propos ed and experimentally demonstrated.In this scheme,the single-longitudinal-mode Brillo uin ring cavity laser is designed and obtained.And then,by using the singl e frequency laser as signal light,based on Brillouin amplification effect,the mul ti-wavelength laser with more than 12wavelengths has been obtained,and the wavelength number can be further increased.The wavelength interval of the laser is about 0.087nm,and the tunable output of multi-wavelength can be realized by ad justing the pump wavelength and power.In 20min interval,the stability of the multi-wavelength laser is measured,and the experimental results show that the multi-wavelength laser has high stability.