Crystal switching device for spectrum detection

The invention discloses a crystal switching device for spectrum detection. The crystal switching device comprises a crystal supporting component, a supporting frame and a positioning mechanism; the crystal supporting component is rotationally mounted on the supporting frame through a central shaft; the crystal supporting component is column-shaped and comprises n crystal assembling structures, wherein the crystal assembling structures are evenly distributed on the outer side surface of the crystal supporting component; the positioning mechanism is arranged on the supporting frame; the central shaft of a positioning base in the positioning mechanism fixedly connected with the central shaft of the crystal supporting component, and is rotationally connected with the supporting frame; and base positioning structures on the positioning base are precisely positioned and assembled to the crystal assembling structures on the crystal supporting component in a one-to-one correspondence manner. According to the crystal switching device, the crystal supporting component and the positioning mechanism are combined, and therefore, the positioning accuracy of crystals can be ensured when the crystals are switched, an action process is reliable, and the service life of a detection device can be prolonged, and therefore, the crystal switching device has obvious advantages.