Laser frequency doubling assembly and laser

The utility model discloses a laser frequency doubling assembly and a laser, the laser frequency doubling assembly comprises a shell with a containing cavity, a frequency doubling module and a light splitting part which are arranged in the containing cavity, and a heat dissipation part which is arranged on the mounting side of the shell, and the mounting side of the shell is provided with a first light hole which is communicated with a light path of the containing cavity; the input end of the frequency doubling module is used for being communicated with an output end light path of the laser emitting assembly so as to receive fundamental frequency laser emitted by the laser emitting assembly and convert the frequency of the fundamental frequency laser. The light splitting part is located on a light path of the output end of the frequency doubling module and used for dividing laser output by the frequency doubling module into frequency doubling laser and residual fundamental frequency laser emitted to the first