Preheating device before sapphire crystal growth furnace heating body forming

The utility model discloses a preheating device before sapphire crystal growth furnace heating body forming. The preheating device comprises a support frame, and also comprises a heat insulation box, heating pipes, a heating wire, a first electrode and a second electrode, wherein the heat insulation box is arranged at the upper part of the support frame, the heating pipes are arranged at the two opposite side surfaces of the heat insulation box and horizontally penetrate through the inside of the heat insulation box, the heating wire is wound on the outer peripheral surface of the heating pipe positioned inside the heat insulation box, the first electrode and the second electrode are arranged on the heat insulation box, and are respectively connected with the two end parts of the heating wire, and heat insulation materials are arranged inside the heat insulation box. The preheating device has the advantages that the device can replace the manual preheating mode, so that the heating temperature can be precisely controlled, internal structures of pipe fitting raw materials during the preheating are enabled not to be changed, the use performance of the heating body after the forming is ensured, in addition, the preheating heat waste is avoided, the preheating cost is reduced, and the preheating efficiency is improved.