Horizontal secondary stretching device and method for ultrathin flexible glass

The invention discloses a horizontal secondary stretching device and method for ultrathin flexible glass, and belongs to the technical field of flexible glass manufacturing. The horizontal secondary stretching device for the ultrathin flexible glass comprises an air flotation device, a heating unit, a cooling mechanism, and a feeding unit, a welding unit, a preheating unit, a transverse stretching and extending unit, a longitudinal traction stretching unit, an annealing unit and a winding and packaging unit which are connected in sequence, the problem that the glass plate is bent downwards in the transverse conveying process is solved, and heating and annealing quality is guaranteed; the raw glass sheets in the conveying process are subjected to butt welding through the welding unit, and continuous feeding is achieved. The device adopts a multi-layer structural design, comprises a vapor chamber and a heating and cooling unit arranged outside, and provides a good temperature gradient field in the heating and c