Invisible veneer positioning accessory and veneer

The utility model provides an invisible veneer positioning accessory which comprises a mounting groove, two bearing plates and two wall attaching plates, the mounting groove is provided with a bottom wall and two side walls oppositely arranged on the two sides of the bottom wall, the two bearing plates are connected with the outer surfaces of the two side walls respectively and are parallel to the bottom wall, one end of each bearing plate is connected with one wall attaching plate, and the other end of each bearing plate is connected with the other wall attaching plate. And each bearing plate and the wall sticking plate connected with the bearing plate extend in the groove length direction of the mounting groove. The utility model provides a combined veneer which comprises a first plate, a second plate, a third plate, a first positioning piece, a second positioning piece and the positioning accessory. Specifically, in the using process, the riveting piece is pre-installed on the first plate, then the positio