The invention is suitable for the field of optical fiber and provides a device for generating super continuous spectrums. The device comprises a continuous wave fiber laser, a high nonlinear photonic crystal fiber and a high nonlinear normal dispersive optical fiber, wherein the continuous wave fiber laser is used for providing pump light; the high nonlinear photonic crystal fiber is welded with an output tail fiber of the continuous wave fiber laser and is used for performing nonlinear conversion on the pump light provided by the continuous wave fiber laser so as to form the continuous spectrums; the high nonlinear normal dispersive optical fiber is welded with the high nonlinear photon crystal fiber and is used for flattening and expanding the formed super continuous spectrums. The device for generating the super continuous spectrums can flatten the super continuous spectrums with high spectral intensity peaks. Simultaneously, the spectrums further expand towards a long wave direction so as to obtain high flat broadband super continuum output.