The invention relates to a demolding device which comprises a table used for placement of a mold, and further comprises a material receiving device, wherein a material dropping hole used for penetration of a workpiece is formed in the table; the material receiving device comprises a material receiving platform arranged below the material dropping hole; the material receiving platform comprises a material receiving station and a material discharging station; the material receiving station moves to a position I below the table, and the distance between the position I and the table is equal to or slightly greater than the height of the workpiece; and the discharging station moves to a position II being in flush with the table. In a using process of the demolding device, the material receiving platform is positioned at the material receiving station when the workpiece is about to be completely separated from the mold, and the distance between the workpiece and the material receiving platform is very short; after the workpiece is dropped on the material receiving platform, the mold is moved away from the material dropping hole; then, when the material receiving platform moves upward, the workpiece is driven by the material receiving platform to move to the material discharging station being in flush with the table, so that workpiece demolding can be completed; and compared with a conventional demolding method, the demolding device provided by the invention has the advantages that the impact to the workpiece can be obviously reduced and the workpiece yield can be improved.