The invention relates to the technical field of fiber lasers, in particular to a fiber laser with an efficient temperature control device. The fiber laser comprises a box body, a first mounting plateis arranged at the middle lower part of the inner wall of the box body; a refrigerating device is arranged at the middle lower part of the inner wall of the box body and is positioned right below thefirst mounting plate; the refrigerating device comprises a second mounting plate; a plurality of rectangular through holes distributed at equal intervals are formed in the surface of the second mounting...
