A fiber terminal box comprises a shell, a splice box and a plurality of fiber adapters located on the shell. The head end of the shell is equipped with a plurality optical cable inlets, and the splice box is fixed on a bottom plate of the shell. The tail of a cover plate of the shell is equipped with a plurality of parallel inclined surfaces which are wave-shaped, and the plurality of fiber adapters are inserted in the plurality of inclined surfaces evenly. The fiber adapters of the utility model are arranged on the cover plate of the fiber terminal box aslant, and a larger fiber wiring space is provided at the cover plate side, so that the case is avoided that the work performance of a power distribution cabinet is affected due to the signal attenuation of fibers.