Preheating device of glass panel safety reinforcing furnace

The utility model relates to a preheating device of a glass panel safety reinforcing furnace. The preheating device comprises a preheating furnace which is installed on a rack upside down, wherein a furnace door of the preheating furnace is slidably connected on a guide rail of the rack, inner side surfaces of the preheating furnace are respectively provided with heating tubes, a stirring fan is installed in the preheating furnace above the heating tubes, the stirring fan is driven by a stirring motor fixedly connected outside the preheating furnace, the rack is provided with a lifting device, the lifting device comprises a driving chain wheel and a driven chain wheel which are above the preheating furnace, the two chain wheels are connected with a lifting chain synchronously, the lifting chain runs through the preheating furnace, and the lower end of the lifting chain is connected with a glass sheet frame. The preheating device has a sliding open furnace door structure and a lifting structure, thereby being