The invention belongs to the technical field of optical fiber preparation, and particularly relates to a preparation device and method of crystal optical fibers. The preparation device of the crystaloptical fibers is characterized by comprising a heat-preservation furnace, a heating light source assembly, a rod feeding device and a lifting device, wherein a graphite piece is arranged in a furnacebody, the heating light source assembly comprises a CO2 laser device and a parabolic mirror, the rod feeding device is used for fixing crystal prefabricated rods and feeding rod bodies into the furnace, the lifting device is used for lifting and pulling crystals, a support is arranged in the heat-preservation furnace, the parabolic mirror is mounted at the top of the support, and light beams of the CO2 laser device form a heating source in an internal thermal field of the graphite piece through convergence of the parabolic mirror. According to the preparation device and method of the crystaloptical fibers, the heat-preservation furnace is combined with an LHPG technology, the LHPG technology provides the heating source, the heat-preservation furnace provides the reasonable thermal fieldto accurately control the temperature of the preparation environment of the crystal optical fibers, the advantages of the heat-preservation furnace and the LHPG technology are exerted, thus the crystal optical fibers can be crystallized better and release stress step by step in the preparation process, and the purpose of preparing the high-quality crystal optical fibers is achieved.