Thermal transfer printing device and thermal transfer printing method for paint surface texture of metal plate structural part

The invention discloses a metal plate structural part paint surface texture heat transfer printing device and a heat transfer printing method.The metal plate structural part paint surface texture heat transfer printing device comprises a supporting table, a scratch film pressing mechanism and a heating mechanism, and the upper end of the supporting table is divided into a film scratching area and a heating area at intervals in the front-back direction; the scratching and film pressing mechanism and the heating mechanism are both arranged above the supporting table in a suspended mode, the scratching and film pressing mechanism is located over the film scratching area, the heating mechanism is located over the heating area, and the metal plate structural part pasted with the transfer printing film is horizontally arranged on the supporting table. A scratch film pressing mechanism is used for cutting the transfer printing film at the groove lines on the metal plate structural part in the film cutting area and p