Workpiece edge sealing device and edge sealing method

The invention provides a workpiece edge sealing device and an edge sealing method.The workpiece edge sealing device comprises a fixing unit capable of transferring heat, an elastic pressurizing part and a heating part, the elastic pressurizing part is provided with a forming cavity wrapping a hole and a hollow cavity containing the fixing unit, and an edge sealing material is arranged on the surface of the forming cavity; the elastic pressurizing part can apply pressure to the edge sealing material under the heating of the heating part, so that the edge sealing material forms a sealed edge on the edge of the workpiece to be subjected to edge sealing; the fixing unit comprises a first fixing seat and a second fixing seat which can be spliced left and right along the hole, and the first fixing seat and the second fixing seat clamp a workpiece to be subjected to edge sealing from the two sides of the hole through a hollow cavity; the heating part is arranged on the fixing unit and used for heating the fixing uni